SCIENTIFIC ABSTRACT SHCHUKIN, YE.A. - SHCHUKIN, YE.D.

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SCIENTIFIC ABSTRACT
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SHCHUYIN, YE. A. - Shchukin, Ye. A. - "Syria. (Economic-Geographic Characteristics)." Acad Sci USSR Inst of Geography, Moscow, 1955 (Dissertation for the Degree of Candidate of Geographical Sciences) SO: Knizhnaya latopis', No. 23, Moscow, June, 1955, PP. 87-104. ii"I., if,fI) DE SILVA, S.F.; SHNXM , A.B.[traxslator]; PRONIN, A.A., redaktar; SHCHUXIN, Ye.A.. redektor; SHAPOVALOV, V.I., tekhnicheskiy redaktor. ---- [A regional geography of Ceylon. Translated from the English] Geo- grafiia TSeiloxa. Perevad a &Mliiskogo A.B. Shmeleva. Red. i pre- disl. A.A.Proxima. Koskya, Izd-TO inostraimoi lit-ry, 1955, 318 P. (CeylovL--Geogrftphy) (KIRA 9:5) GOUROU, Pierre; KAMOVA, M.M.[tr&nslatorj;SHMWZV. A.B.[translatorl; SHCHUKIN, Yo.A., rodaktor; IOVL97A, N.A., tekhaicheskiy radaktor. [Asia. Translated from the French] Axiia. PersTod a fraitsuzakogo N.M.Makaravoi i A.B.ShmelsTa. Predial. Koustantina PopoTa. KoskTa, Izd-To inostrannoi lit-ry, 1956. 466 p. (KIRA 9:5) (AsiA--Gmogr&phjr) - SHCHUKIN, Ye.A. Division of Syria into economic diatricts. Izv.AN SSSR*Seregeoge no.6:59-69 N-D 156. (MLRA 10:1) 1. Institut vostokovedeniya Akademii nauk SSSR. (Syria--Zconomic geography) GAV.J-LOV, li'.I.; GLUSHj%l.OV, P.Ijdeceased]; IlIKOLISM, ml.I.; _~~.CHUKI~N Ye.A. KOSTINSKIY, D.U., red; ZHU~LAVLEVA, GOLITSYI*., A.V., red. kart; BURLAKA, KOSOLAFOV, B.Ye.; ZABIROV, B.Sh., red.; G.P., mlad. red.; N.P., tekhn. red. [Countries of North and Northeast Africa; geographical informa- tion] Strary Severnoi i Severo-Vostochnoi Afriki; geografiche- skie spravki. Moskva, Geografgiz, 1962. 39 P. (MIRA 15:7) (Africa, Forth-Geograpky, Economic) SUB) A.A. Prinimiala, uchastiye TITOVA, T.A., aspirantka; FOZODAYEV, N.S., red.; SERDYUKOV, A.R.., red.; SHGHUYJli, Ye.D., red.; ~.Z~ASIIOVA, N.Ya., tekhn. red. [Radio engineering methods for studying radiation] Radiotekhni- cheskie metody issledovaniia izluchenii. Pod red. M.S.Kozo- daeva. Moskva, Gos.izd--tro zekhni o-teoret.lit--ry, 1951. 388 p. (MIRA 15:1) I., Moskovskiy Gosudarstvennyy universitet (for Titova). (Amplifiers (Electronics)) (Pulse techniques (Electronics)) USM/Uetals - Ordering Jun. 52 ."Texture of Magnesium, Zinc and Cadmium Layers Obtained During Condensation of a Molecular Beamj," N. V. Melnikova, Ye. D. Shchukin, M. M. Umanskiyp MOBCOW State U "Zhur Eksper i Teoret Fiz" Vol XXII, No 6, PP 775-779 Investigates the structure of layers of various hexagonal- system metals obtained by condensation of a mol beam on a non-cooled or cooled to -700C background. A law, lst observed for zinc, holds for al-1 (Mg, Zn, Cd) metals. The law concerns orientation of crystallites which is connected with the direction of the mol beam and leads the plate to quasi-monocryst state. Received 29 Sep 51. 2i7T46 /Z SIYKIN, Ye. D., Cand Phys-Math Sci -- (diss) "Study of the heterogenei~~'of,Tlastic deformation of metallic monocrystals.11 Mos, 1957. 15 PP (Inst of Phys Chem, Acad Sci USSR, Departmant of Disperse Systems), 100 cdp&es (KL, 52-57, 103) - 8 - AUTHOR: Shchukin, Ye. Pertsov, 11. V., azid liozii'aiiskiy, N~ ACT Vl~~,,hod fo-r-th-e InvestiE;a-lion 04' T-rr_gUlarity of Plastt-ic TITLE: Deformation. (Piletodika Issledovaniya fleravnomernosti Plasticheskoy Deformatsii.) PERIODICAL: Pribory i Tekhnika -Eksperimenta, 1957, No. 2, pp. 98 - 102 (USSR). ABSTRACT: Jump-like deformation of metallic mono-crystals at constant loads is fully discussed in References 1 - 3. The results of previous investigations have shown that in order to obtain more accurate data for the investigation of the effects of evalanche shear, the sensitivity of the channel 1 and -the frequency pass bands of the channel R should be increased. In the present article the authors describe a method of continuous registration of small sample deformations with an accuracy of dolwn to 56R and frequency pass band of the channel 0 - 20OOc/s, and of simultaneous small changes 8of the sample resistance with accuracy do~;m to 0.5 x 10- ohm and frequency band from a fraction of a cycle to 1000cls. A schematic diagram of the mechanical part of the apparatus is Saven in Fieure 1. It is assembled on a vibration proof and temperature insulated plate, the sample used is a aire Card 112 0.5mm diameter, 3.3Cmm long. The channel of the register A Method for the Investigation of Irregularity of Plastic Deformation. (FiE;. 2) uses a photo cell type StSV-3 (CI:XB-3) placed with its light source in the chamber 1. The channel for the registration of jump-like changes of the electrical resistance (channel R, Fig. 3) consists of a sensitive AC amplifier with a frequency band from 4-20OOc/s and with the level of fluctuation 'noise as referred to the input, of the order of a few thousandths ofwV. The experiments have shown that the instrument has a high degree of sensi- tivity and stability. A schematic diagram of the mechani- cal installation, the basic circuLt diagram of channel 1, the basic circuit diagram of the channel R and a photograph of small jump-like deformations are given. There are 4 Slavic references. SUBMITTED: November, 28, 1956. ASSOCIATION- Institute of Physical Chemistry of the Academy of Sciences of the USSR. (Institut Fizicheskoy hhimii AN SSSR) Faculty of Chemistry of the Moscow State University imeni 11. V. Lomonosov. (Khimicheskiy Fakulltuet 1,,-,.,GU im~ L. V. Lomonosova.) M AVAIIABIB: Librery of Congress. Card 212 2o-6-13/48 AUTHORS: Shchukin, Ye.D. , Rozhanski.y, V.'T. , 1vc:,L-_-:0v1 1"ITLE: On the Modification of the Rheostat Durin- the Occurrence of an Elementary Displacement (0b izmenerii e lekt riche skoC;o soprotiv- leniya pri elementarnom sdvigoobrazovanii) PERIODICALt Dolclady AN SSSR, 1957, Vol- 115, Nr 6, pp. 1101 - 1103 (USSR) ABSTRACT: The investi-ations of the "elementary" displacements of about 500 - 2000 1 are the most interesting ones, which occur in a gliding zone. For this purpose the ability of the channel to record deformations was raised to 50 L The experiments were carried out with cadmium monocrystals of a diameter of Ot75 mm, and with zinc monocrystals of 0,5 mm of diameter. These crystals were 15 - 20 mm long and the angle between the hexac.-onal axis 0 and the direction of extension was 30 . The extension experi-! ments were carried out at room temperature and led to an ex- tension of 3 - 5 In connection vrith slight and slow deforma- tions like these the'total increase of the resistance was not remarkably higher than the geometrically conditioned increase. The results of the accurate measurings of the oscillo.~~raphical- Card 1/3 1y registered cracks from Cl - 350 !, upwards in the case of 20-6-1-3/48 On the Modification of the Rheostat During the Gccurrence of an z.L'_-:.jenLarY Displacement cadmium and zinc iiionocrystals are shown in a diagram. These data -ivc evidence of the follyning fact: The streak of the effective values of q IXI.2r 0-has an S-ahaped form with the f lexion in the area 111-~d500 to 1000 Iq and with a total decrease up to 30 ~-' 0.8 aompared with the geometrically condi- tioned values with 01 > 1000 L This corresponds to a dis- placement by about 500 interatomic distances in the direction of the gliding (here R denotes the rheostat, 1 - the exten- sion and r 0 denotes the resistance of the unit of length of the not deformed sample.)p re-establishment of the order and a de- crease of the defects of the structure within the area of the gliding corresponds to the large cracks which exceed a certain critical amount. It is especially referred to 'the paired cracks. Finally the authors give an explanation for the development of the phenomena here descri bed. Despite the short duration of the cracks the importance of the vacancies in connection with the increasing resistance of the hardened metal and its relation to the dislocation mechanism of the deformation has to be con- sidered. There are 2 figures and 6 references, 2 of which are Ct~rd 2/3 Slavic. AUTHORS: Rozhanskiy, V. N., Pertsov, N.V., 20-5- L 4/48 Shchukin, Ye. D., Rebinder, P. A.. Academician TITLE: -Effect of Thin Mercury Coatings on the Strength of Metallic Monocrystals (Vliyaniye tonkikh rtutnykh pokryti.T na prochnost' metallicheskikh monokristallov). PERIODICAL: Doklady AN SSSR, 1957, Vol- 116, Nr 5, PP- 769-771 (USSR) ABSTRACT: At first the authors shortly report on respective literature. In the present works the monocrystals. of zinc, tin, cadmium and lead (degree of purity 99.99 %, diameter 0.5 mm, length about 10 mm) were investigated. As surface-active substance served mercury which was applied in form of a thin coating by means of immerging the sample into an Hg2(NO 3)2-solut ion. The mercury covered the monocrystal. with an equal film of about 0.1 p thickness and was rapidly saturated with the metal to be investigated. The investi- gation of the strength properties of the amalgamated mono- crystals in their expansion with constant velocity showed that the strength of the zinc- and tin- monocrystals Card 1/3 covered with mercury was a few times less than the strength Effect of Thin Mercury Coatings on the Strength of 20-5-14/48 Metallic Monocrystals. of the non-amalgamated monocrystals. Such an abrupt decrease of strength is obviously connected with the important decrease of surface tension at the metal/mercury boundary as well as with the decrease of the production operation of a new surface at the crack. The investigation of axial ground sections of amalgamated zinc-monocrystals according to their deformation showed the following: The cracks can develop on the surface as well as in the interior of the monocrystal, which can be seen in observing the axial ground sections. The develooment of the cracks in the inner part can be connected with a noticeable diffusion of mercury into zinc (atroom temperature) with subsequent decrease of the surface tension on the developing inner separation surfaces. The rise of temperature up to 1600 C annihilates the above-mentioned phenomena of catastrophic brittleness with the zinc-monocrystals investigated and reconstitutes completely the plasticity and the strength. Also the decrease of the deformation velocity causes phenomena which are similar to those developing with the rise of Card 2/3 temperature. The strength of the body decreases with the SHCHUKIN, Ye. D., ROZHANSIL-TY., V. N., G(EUIIOV,, G. V., and MISOV, N. V. ......... "Unhomogeneous Plastical Deftrmation and the Effect of Surfacd-Active Mediums on the Yechanical Properties of Crystals." paper presented at the Conf. on INIschanical Properties of Non-metallic Solids, Leningrad, USSR, 19-26 May 58. Moscow State Univ., Inst. of Physical Chem. Acad. Sci. USSR, Moscow. B1Y.UK-,UNCIIA, I.S.; STICRUKIII, Ye.D. Effect of mercury coating on the stability of zinc monocrystals at low teaperatures [with summary in English]. Inzh.-fiz.zhli--. J. n0.8:116-118 Ag 158. (MIA 11: 8) l.Institut fizichesko7 khimii All SSSR, Mosk7a. tZinc-Metallography) .. .. I / e- ,- , . " I ': I Y---. L,-). . III I I "Stil-*--, of the lon-Uniformities of the Plastic Deformation of Metallic Single Crystals/'.- (Izucheniye neodnorodnostey plasticheskoy deformatsii metallicheskiKh mr,n3kristallov) Candidate of Physico-mathematical Sciences, Moscow, 11-157. Ac.3c. USSR. Institute of Physical Chemistry. TITLE: Di'ssertztions (Dissertatsil) PEIRIODICAL: Meta lloveden i ye i Obrabotka Metallov, 195,',", No. 2, P. 63 (USSR) - SOV/120-58-6-24/32 AUTHORS:Dekartova, N. V., Rozhanskiy, V. N. wad Shchukin, Ye. D, TITLE: Recording of the Damping of the Oscillations of a Torsiona--1 Pendulum of a Loop Oscillograph in the Measurement of Inter- nal Friction (Zapis' zatukhaniya kolebaniy krutillnogo mayatnika na shlleyfovom ostsillografe pri izmerenii vnutrenn- ego treniya) C) PERIODICAL: Pribory i tekhr-i-ka eksperi-menta, 1958, Nr 6. PP 107-109 (USSR) ABSTRACT: The internal friction of metals is often measured by the damping of osciliations of a torsional pendulum (Refs.-, to 4), The amplitude of these oscillations is usually mea- sured with a lamp and scale arrangement. To record torEJi.-_n--?._! oscillations, the present authors have used a special a--lac-n- ment which will record the oscillations wi-chin the rang, -e 0.1 - 10 c/s with an accuracy of about 3". The pendulum is illustrated in Fig.1, iia which 1 is a quartz tube, 2 is a furnace, 3 is the specimen, 4 is a vacuum chamber for the pendulum, 5 is a mirror, 6 is a damper of transverse Card 112 SOV/120-58-6-24/32 Recording of the DamPing of the oscillatiDns of a Torsional- Pendulum of a Loop Oscillograph in the Measurement of' -Tn-,,ernal Friction vibrations, 7 are loads, 8 is an aluminium rod, 9 is a window and 10 is a connection to the pump. When the mirror is at restl the spot of light reflected off it is roughly in the middle of a photo-element which faces it. As the pendu- lum is set in motion, the spot will mDve across the photo- element and an alternating signal will appear across the load of the Dhoto-element. This is then amplified and then recorded on a loop oscillograph. The circuit is shown in Figs.2 and 3 and an actual record of a typical oscillation is Shown in Fig,4, There are 4 figures7no tables and ? referen- ces, of which 3 are English and the rest Soviet. ASSOCIATION: Khimicheskiy fakul'tet MGU (Chemistry Department of TMoscow State University) SUBMITTED: December 24.. 1957. Card 2/2 &irface we!.! as Development or report presented at the Conference on Irmestigation of Mechanical FTopertles of Pon-Metals, by the Intl. Society of Pure and Applied Physics and the AS USSR, at Leningrad, 19-24 May 1958. (Vast. Ak Nauk SSSTI, 1958, no. 9, pp. 109-1U) Shchukin, Ye.D., lwbinder, A, ~;oll -6Q-'()-5- T T T Th e r::~ a -, i on 1---n Surfaces D-rinz ',-e 2efs=atJ :n and Runture of a Solid in a Surface Active 'Miedium ~,',brazovaniye novl,k, Poverkhrostey pr~ deformirovan4i i razrushenii I-ver- dogo tela v poverkhno:3tno-aktivnoy srede) P:,-RI 0 D ~:Ol 1 04 dnyy zhurnal , 19'-5, -Vcl XX, 1;r pp 64~ -654 (USST A 3 S T W~ U T T-e ai3crotion of surface-active substances by a sclid body which is being deformed, may influerce its defcrmation and resistance properzies. ThJ5 is zrue for the deformation of monocr.-,'stals ol tin, zinc, and other metals in solutions of non-polar vasel-ine oil, in comparison to the fr-e sur- race energy of these monocr-stals (500-1,000 5rgl'cm-), the reduction amounts to only some tens of erg/cm-, This effect Is exulained by the movement of dislocations and their in- teraction with the surface eneraIr. The di'31ocation -:.s a thermodynamically unstable defect. it, is att--racted to the surface and the attraction force is reversely proportional to the distance from the surface. Brittleness and a decrease in resistance ma.-; be observed in moncerystals of meta15 --r the presence of a covering of a low-rielting metal., like tin or mercury, Tlie decrease of the -free surface energy on the Card 1,12 border between the metal and its saturated solution is con- -15/2 The !formation of New S~_rfaces Dlir~_ng the Deformation and Tluptuie of A Solid a Surface Active :,'edium ASSr ,~C TATION SUBI,:I-TED siderable t a T. o ~_~ n t s t 1~ h u n d r e d s .3 _-~' e rc m, The actual rupture stresses on the ciea-,a,ge planes are lower than the calculated values, This is due to micro-cracks in the :ry- stal, The change in defolmation and resistance p_rcperties under the irfluence of adsorp-,,ion is also observed In glass It has been stabl--shed that "he presence cf water vapor re- duces the rupture stress of glass fibers, Under the influ- ence of adsorption, the -free surface en~rgy_of a solid body may be reduced to some terths of erg/ /cm ~ in such a case, a spontaneous disp 9rs-ion o-C the body into par"Lcles of coilo- idal size with _1(_1 cm in diamet-a-z -takes -.1ace. Phers. are 2 sets of graphs and 28 re-ferences, 19 of which are Soviet, 7 English, and 2 German, institut f4 z~ches`,Dy kh-;m~- AY S51~11 Otdel d4spersnyklh sistem ;I.oskva (Instituze o' I.Physical of the USSIR Academy of Sciences De par tme al of D-,*s-_1e.-sed S-:!-s~.emsI~.roscow) June 16, 19~8 Single 2. Metal crystais--Properties Card 212 - - . - I -- . . - --. . .1 1 . .- . . . . - - . - .. - I - . , --- , , , . - . , --I , i . L . , Dt'U11 V , U . vI . ; "Defoi7mtion processes, the rheological conduct and the destruction of solids and metals." r"ort prosented at tile rowth Au-umlcn Cawerame an Colloidal Chm"tZ7, Tbilisi, Gearglan SM, 32-16 My 1958 (MDU Mur, 20,5, p.677-9, 158, Tsnb~, A.33) U'T ", 0 1" S Ye. S0V1':-z-r):-2-,',1 "I ii:i_; I S'-Ichukin 4 , TTLE: , of 'TetL?JS ca or, ation 777-nomena in the 'Def . _ yavloniya pri deformatsii rict.,-Il-IoO I'ERIODICAL Usre':"i fi--.ic!ieski'-h naulk, 1050, Vol 66, Nr 2. pp ~13- 2,'~'; A'~STRACT: 1~1 t'.1c c o,,,.r s eof the past 10 years a new f-Jeld of science ,nas opened tip by an association of So-,-iet scientists headed by I'. 2'_ Rebinder: the so-called physico-chemical mechanics, w1lich is a f-4eld borrierin, upon those of physical chemistry, Molecular ph~ysics,and the mechannics of materials. The main aims of tl,.is new field of science are: 1) Explanation of the laws and the mechanism of the production of solids of -iven structure and mechanical properties, and 2) the inve3ti,,-ation of processes of deformation, of the working up and of the destruction of solids in consideration of the influence exercised by physico-chemical factors, tne compo- Sition. and structure of the body, of temperature and of the surrounding medium. Extensi-ve experimental material J_s now available in this field upon the basis of which it is pos- Card 112 sible to develop a theory of the processes of production Physico-Chemical 11henomena --'In the Deformation off' 111--tals SC V,lc,:,'z -6r.- 2 -4 /1 C, and destruction of solid materials as well as of the cond-i- tions for the best imethod of Drocessing. Theoretical work is based upon the dislocation theory. The authors of the p.resent paper give an extensive and, in Darts, detailed purvey of the principal results obtained by investigations carried out in this field durini~ recent years; results obtain- ed are discussed on the basis of numerous references to publications. The results of the physico-chemical mechanics of metals are also subjected to theoretical treatment (dislocation theory), The most frequently used materials fcr investiC,,ations were zinc and zinc monocrystals. There are 20' fiz~ures., A, tables, and 69 references, 2) of which are ~3oviet. Card 2/2 20-2-1 c160 AUTHORSt Shchukin, Ye... D. , Goryunov, Yu. V. , Pertsov, N. V. Rozhanskiy, V. 11. TITLE: On the Nature of the Unhomogeneous Plastic Deformation of Eetal Mono-Crystals (0 prirode neravnomernosti plasticheskoy deformatsii metallicheskikh monoicristallov) PERIODICALi Doklady All SSSR, 1958, Vol. 116, Nr 2, pp. 277 - 2",'q (USSR) ABSTRACTs In a previous work the followina was shownt The jumps of deformation of 0,5 to 20 U which usually can be observed in the case of exDansion of a zinc-crystal, have a very compli- cated structure and are the sum of a series of elementary jumps, which form in the various cross sections of the cry- stal. The investi.~ation of Vic elementary shifts made it ne- cessary to diminioli thc inertia of the apparatus considerably and to increp-sc its sensitivity to 50 R. The mono-crystals with the diameter of 0,4 to 0,8 mm, which were of very pure (99,99 zinc, cadmium, tin, 1-e-ad and aluminum, were stretch- ed during constant stress and at room te.-aperature, whereby Card 1/3 the stress was a bit higher than the stretching-strain limit. 20-2-19/60 On the Nature of the Unhomogeneous Plastic Deformation of Mietal hiono-Crystals In all the cases of the test-pieces (save aluminum) together with the deformation also the change of theelectric resistance of the test-piece was registered. In the c ase of stretching zinc, cadmium and tin many small jumps of 150 to '00 1 on to 2 000 a with a duration of 1 - 3 to 30 microseconds were re- ig7istered. Jumps until 10 000 - 15 000 R were found rather seldom, and if they were found, they were usually of several small jum s. Also considerably less expressed jumps of 1 000 to 5 000 ~ were observed. By careful microscopic examination of the deformed crystals was found out that those jumps of deformation result on shearing and not on twin-formation. The number of jumps, which can be observed, increases with the decrease of their size klat least on to 250 - 300 R). Obviously there is no minimum size of the jumps, but a superior limit of the elementary shift. In the case of mono-crystals of alu- minum and of lead a clearly marked formation of jumps was not observed. The results which were found out here prove the re- sults on lar.1-e jumps. The discontinuity of the flow and the quick jumps are to be regarded as a com::,,on feature which is produced by the nature of dislocation of the plastic defor- Card 213 mation. There are 4 figures, and 6 references, 3 of which are AUTHOR: Shchukin, Ye. D. 20 -11 ( -, -1 a / -x 3 0 J, 4, TITLE: A Criterion of Crystal Deformation Capacity and Adsorption Effects (Kriteriy deformiruyemosti kristalla i adsorbtsionnyye effekty) PERIODICAL: Doklady Akademii Nauk SSSR, 1958, Vol. 118, Nr 6, pp. 1105-1108 (USSR) ABSTRACT: First the author shortly reports on previous works dealing with the same subject. According to the theory of Mott the local concentrations of the stresses in a crystal are caused by dislocation accumulations which are formed in front of various obstacles in the glide plane. In the case of existente of a shear stress 'yand of n dislocations in the accumulation the force reaches the value n3b per unit, oflength, whereby b denotes unit translation. In reality n is limited by two factors: 1) If the leading dislocation is well fixed the dis- locations will accumulate at the distance L in front of the obstacle - Card 1/4 in1 n (1-tA,)L.7/Gb. A Criterion of Crystal Deformation Capacity and Adsorption Effects20_jl8_6-15//4z Here e-4o denotes the Poisson coefficient, G the shear modulus, and L denotes the diameter for smaller ( ~4 1 mm) monocrystals or the grain size for the polycrystals, resp. 2) The obstacle is characterized by the potential barrier U(x), its height Umax determining the activation energy in the overcoming of the obstacle at ;Ir - 0. The quantity Igrad U(x)j max /b2 = Ti(o) represents the local stress n 3' necessary for rupturing at T = OOK. The author then introduces the quantity S = N/n which is important as criterion for the deformation capacity of a crystal. Here applies N= 12alT b, n = min ~ n, ;n 2~ , n2'Z1/7" a denoting the specific free energy of the surface of the developing microfissure. Explicit terms for this criterion are given and discussed. A term is given for the critical Card 2/4 tempDerature of the transition from brittleness to plasticity. 20-118-6-15/43 A Criterion of Crystal Deformation Capacity and Adsorption Eff-ct--- In the case of weak (organic) adsorption active agents (which cannot render it brittle, but plastic under certain conditions) a slight modification of a itself cannot displace considerably the branches of the criterion S. If, however, in the case of the given deformation conditions the interactions b"ween the dislocations and the free surface of the crystal play an important r8le, even a slight decrease of a can considerably increase the second branch S2 of the criterion. The corresponding energy barrier U max - ba t' 0,5 eV is due to the occurrence of an inter stage in the transition of a dislocation to the surface and is considerably steep. The ,:-enerality of the scheme suggested here was limited by various conditions which then can also be omitted. There are 2 figures and 18 references, 6 of which are Soviet. Card 3/4 2o-113-'-15/43 A Criterion of Crystal Deformation Capacity and Adsorption EJL~fects ASSOCIATION: Institut fizicheskoy khimii Akademii nauk SSSR (Institute of Physical ChemistryAS USSR) PRESENTED: October 2, 1957, by P. A. Rebinder, Member of the Academy of Sciences, USSR SUBMITTED: September 22, 1957 Card 4/4 LA 150) AWMI. YkabLader. P. A., Academician TIVU, Now Trecade of Colloid Chemistry (S.,77- p~ti -11tty. kolloldmor khtwiti) PMUGUICALS Ustaik Aked-13. cook 3351, 1959. Yr 1. 99 44-51 (0331t) LDSTW?t At protect. coll.id chemistry play. an especially important Ps" Is political economy a. it to . alone. raise substances of modern ..qt ... ring, It is Of great Free, l.al importers. that .% pr .... t it to possible to carry as wal.torruptot tro,mettloom froa lyophoblo to ljophilto "st4se. 2hu., it is possible to obtain technically important with the required dtructural-sechanioal properties. ,be theory of highly molecular substance* and their solutions ham d.vol.p*4 Late M Independent br".h of ..11old oh..t.tr7. fte witallty of *ad.- ..11cid chemistry 1. V-4 by the f, % It produce. s"I now independent branches of antance. .:t* the muthcr describe. the QcUr.. Of the Ath All-U.I.. = ftaf.rew.. of Colloid Chemistry obt.h took plan. In TUL11.1 It a- rg&mL..4.jY.th. Otd.l..17. khkvil.~.. a.-RatuagA (Xty-v)--P.rt.d a the pr .... t state" of research in the field ValvW*f and 1.) d - d I ~2.1~11 the regularities of -Yna.r..t. to r.sea. with collaborators Poke &beat the results :f oxmi"ti.a of water pruportlea &.ud truct~o of peat by ."a G~ rdlo"tLv. Isotope.. .ti... of vdxo'ptl.A and a r: td-. is a-11.1d dispersion yet.... T. n and him collaborator- reported an the develop- seat a loctro tatio tabilitr theory .. all .. the j 0686.1 asion of 4l.p:r.lO. system., and on the theory of ftrustlon and the prvVertle. of sommaj.. f rwo the Call ffeare,at.. for . f.lt t.btlL..%ic. fr dL.P.r.t no let..., me, r. A. Asoinder based it is him j ... $t,4ratiDow (S.f 1). *h thv*r:.t,1:*'l1r -hovd.tht am j..-.4 'i .... it7 too ti Lev of th at abilL..r to offi.i.at to of Particle I Z' X- Dubin" wed him P-pit- 4.4i:.t.. of report. to =o- to the field of trc.loral charma tort. tics, 11,64XIaborstor, examined new %pp,"c_ Of henry of electrode proo.o.... I.e" d1:...s:d IiAA L~;'M,11' A a---f-..-t-uiT-1 1,.-. '14f." tt t1:1 fit or .1 7- r .1 or the chemical Wddlfl-stl-ft Of the wurf.o.. of ..lid part,. its (.a.t). To*To:;PAwlwva' and collaborators reported on th; alIflostiba of the p"..48 of form.tio. or too structure is the b&rdsuing Of win-r.1 binding agents. I, I, D"ttita"howed that the appear".. of high elasticity If 6ORM&Gt-d .1th the fOrmstiOu Of dt-perston -tmotura. a. r2 at 1k r,kO, ) .2-t..4 the colloidal state of ~~%Y: ~La thto fit.. and ...,Joe. lorified the thooretLeal criteria card im. -'r.-Im: I t,,. portion Of I d bodies, specialty at.,., is surfa. wa-undtg.. -Plrt,.d... th,' -PP,-.-ra--# Of ".at of law d tIt r and collaborators the Wines.. of rhoologlool properties Of prtattog their "Shartor in the printing prooo.m. _1-_j6_zZQ_w'w_tL "ported r&,.1 111%.ti.c b. on the 4 Pmt!*" *lo* beat table- .4 .me ti.. truo t~ "a in th du tto. -at* .7 y o 7 11 0 AUTHORS: Shchulcin, Ye. D., Pertsov, N. V..V Goryunov, Yu. V. TITLE: Concerning the Change in Mechanical Properties, Structure, and Electrical Conductivity of Metallic Single Crystals Under the Influence of a Strongly Active Adsorptive Medium PERIODICAL: Kristallografiya, 1959, voi 4, Nr 6, op 887-897 (USSR) ABSTRACT: This article deals with changes in the mechanical strength and deformation characteristics of solids due to vanishin-ly small 'amounts of adsorbed surface- active matter, Increased plasticityc-nd flow rates, lowered yield lim.1ts of metals covered by organic compounds which are lightly surface-active, and increased brittleness of high-melting metals coated by low-melting metal melt such as of Zn and Cd coated by Hg or Sn. Possible explanations for these phe- nomena are cited from the works of Academician P. A. Rebinder and his school (Dokl. Acad. Sci. USSR, ill, Card 1/6 1284, 1956; and others). The authors studied the Concerning the Change in Mechanical Properties, 77113 Structure, and Electrlcal Conductivity 0~ Meta'LlIc Single Cryotals Under the Influence of a Strongly Active Adsorptive Mediwn p'aysical properties and structures of -polycrystal-14-ne soecimens and artificially grown sitigie crystals of zIn, Cd, Sn, Pb, and Cu of highly pure compositions, 0.5-1 rnm in diameter and 10-25 n-i long, with or -....,ithout coatino- by molten Ga or Hg. The experimental data are presenled in figures and tables beloi-i (FJL,-,-. 2c, 4, 5, il). X-ray diffraction data disclosed that Ga-coating with subseauent Ga penetration into the crystals increases unit cell dimensions and leads to a gradual u partition -f Sn and Zn single crystals into an in- creasingly larger number of disoriented blocks., i.e., Uo the transformation of single crystals into poly- crystalline specimens. Ga-coated C..-, and HS-coated Zn crystals did not show partition into blocks even after long aging. Ga-coating improved the mechanical properties of polycrystall-ine Sn and Zn. The electric resIstivities alon~r the axes of hicrh resistance of Sn and Zn sinE-le crystals dronned '-ra-oidlor V.'ith the Card 2/6 partition into bloc!.-Is and increased along the Card 316 77113 sov/7o-4-6-14/31 75 90X Fig. 2c. Ultimate tensile (P.) and shear (-r.) stresses as func- tions of the orientation of Zn single crystals coated by Ga-melt, at indoor temuerature. X denotes angle between basal iDlane and crystal axis a," rupt-iire Point. 1-5 .70 45 60 75 90'X. Fig. 4. Ultimate tensile (pc) and shear (-r.) stresses as func- tions of the orientation of Cd single crystals coated by Ga-melt, at indoor temperature. >( denotes angle between basal plane and crystal axis at rupt~ire point. 77113 sov/7o-4-6-i4/31 30 160 24X 5. Ultimate fmction of aging, Stretching a' he and 0. 62 rrin c 14 ments. tensile stress P c in a Sn single crystal as after coating by Ga-melt at indoor temperat-lure. r te of 2.4 mm/min of a crystal 13-14 -,-n long mmeasure - fool] ^-450; o denotes averag-e of 3-4 Card 4/6 du ro 7,'.--. L P r, _., t _; C- 3 cnariica' 77113 and EICCtri-Cal C-Onductivity sov/7c-4-6-14/3i Metallic Sin,-,IE,, Cry,,itai:j Under the Infl.Lience of a St-"on,gly tItctivr-- Ad.,~orptli,,,,c Mcclium P FiG. 11. Tension curves of single- crystal and polycrystalline Sn at temperature of liquid N. F is ultimate tensile -tress; E, elongation (%); (1) and (3), I u single-crys-"-,,-.,l and polycrystalline Sn, re spec -"-.: -.--1y, without "a- coating; (2) and (4) the same --aith Card 5/6 Concerni-ng the Change in Mechanical Properties. CD - 77113 Structure, and Electrical Conductivity o--P SOV/71C-4-115-14/31 Met-allic Single Crystals Under the Influence of' a Strongly Active Adsor-otive liedii----m lo,,-i-resistance axes; both approached the resfszivity of t'-e resiDective polycrystall-ine specimens. 'P-1- and Cd only slilghtly c~~anr-ed their res-Istiv-ities. --moro-;ed me(,l-lanical Dropc-r-,ies of polycrystalllinee spec--7nens to cmen a nei-., way for de,.,,~Iojrnent. of h-_";z--s-.rer-zh A. I. Kit;ay.,~Iorods'ft-ly and T. tma*n a-e fo--- discussionz3. T'-ere are 11 ta--les; and 23 refe--ences. 24' Sov-ieL~., ' U.-II-I., 1 , 'i The 'U.K. refe-rences are: ,,er,rnan, 1 jaDanese. Deruytt~~L-e, j. Tns-. -e~als, 3 3,371 U ?r'oc. ROY. Soc. P23., Philos. Marr 19-8, C) If 3, 597., ASSOCIATIO'Ni: State T Tn 1 4- y J Tilen V. Lomonosov universitet, imeri T'.. V. Lon,.onosova) S 'J B MI T ED, Serite-ber 2., ---.t:7,9 Card 61r. 18(4), 24(2) 05276 SOV/170-59-7-7/20 AUTHORS: Kochanova, L.A., Andreyeva, I.A., Shchukin, Ye.D., LikhTman, V.I. TITLE: Regularities in the Brittle Practure of Pure and Alloyed Single Crystals of Zinc PERIODICAL: inzhenerno-fizi,:heskiy zhurnal, 1959, Nr -(, PP 45 - 52 (US5R) ABSTRACT, The authors Studied regularities in the fracture of pure and alloyed single crystals of zinc along the cleavage plane (01001). Pure crystals were taken of 3 kinds: containing 99.999% of elemental zinc, containing 99.99% of it and commercial zinc; those of alloyed specimens contained 0.2 and 0.5% of cadmium. Experiments were carried out in two versions: in the absence of an active absorption medium at a temperature of -1960C and with a thin mercury film of about 5~,thick. applied to the specimen, at room temperature. Crystals were produced by the zonal crystalliza- tion method and were 0-54 to O.Q1 mm in diameter and about 10 mm long. The fracture ol .-ia~; performed on the Polyany device at a con- stant stretching rate of !U- to 15% per minute, The aul-hors formulated a 11condition of the c-onstancy of the product of normal by sieari-rLa, stresses", which is expressed by Formula 1 p, , 'Cc = const = K2. By analyzing a Card 1/3 considerable amount of experimerr:al data the authorz have established that 05276 SOV/170-59-7-7/26 Regularities in the Brittle Fracture of Pure and Alloyed Single Crystals of Zinc this condition is fulfilled within a wide range of orientations of single crystals for both pure and alloyed specimens. As the quantity of the admixture increases, the value of K also increases. The authors explain this by a hypothesis on the origination of heterogeneities in the shearing process and occurrence of plastic deformation during a phase immediately preceding fracture. The value of K for amalgamated specimens is twice as low compared to - non-amalgamated ones, both for pure and alloyed crystals. This is explained by the lowering of the surface energy of zinc in the presence of mercury. The condition formulated by the authors agrees well also with the ex- perimental data of the other investigators in this field, such as Deruyttere and Greenoqgh ZRef g, and is consistent with the theory Card 2/3 of P.A. Rebinder ZR-efs 7-101 on the effect of adsorption-active media 05276 SOV/170-59-7-7/20 Regularities in the Brittle Fracture of Pure and Alloyed Single Crystals of Zinc on deformation and strength properties of solid bodies. There are: It graphs, 2 tables and 13 references, 12 of which are Soviet and 1 unidentified. ASSOCIATION; Institut fizicheskoy khimii AN SSSR (Institute of Physical Chemistry of the AS USSR), Moscow. Card 3/3 2A, ( 2 ) A'L~'21: "':, S: SOV/20-12A-2-1,3/71 TITLE: On the Bri tItle _Hvpture in Sinffle Cr,-.,,stels olf Zinc (0 khrurkom razryve monokristallov tsiril-) ~I~DTCAL: PEI - I- 01 - -Iden'Li r~~ul: 333S' IT j Dol-lady Ak 1 r 2 p 507-~10 L , . . ' , , p (ussi,) A B S 2-`1 C if in -a body is a crack of the magnitude c, the relation !iolds for thf~ don-orcus tension vertical to the P C surface of the M here denot;es a certain dimensional coefficient "inc-Z, not di.i.'~`er considerably from 1. Under t',-e action t1h.- ti~nt:ion T crystal is asswneO to be shi ted I),: ~ !.he ~-_:nount i~ut shiftin.- i-_ not supposed to over the entia,& cro~:E; section z, ro because of the presence of a saIi.' obst.acle 0 in the slip plane. Shear is tn,-ju localized to a limited interval and the field of tension exic-tirir; in t:'!e r~-~,r;ion !:urroundine this defect can then be compared wit:, t,e i,la.,ltic Field of an incision which is ,)arallel to tii,~ tension. _-Ile marimurn e,.-rj,;nclin- tensions ' fL the act along a 'Line foripin~f the angle 0 with the plane o Card 1/3 incision. An is %vritt~!i, do,.-ni for the reduction of On the 11,upturfa in o_L' ",iac SOV/2O_12A,_2_1~;/-j-I elastic ac a re-,ult o:' L,,e ofenin- of the cracl-. T.' in Ue sli,3 ~;hift_ havc not been carried ou,. accuri:ulabc .:it' in tiic: abuv--~ inLerval, it may be that in cr,,stal a crack ccri-e;-rI-~n(,_in~-- to couilibrium. is for-to(I. ..'he author ic ~'n~crc-,;Lcd izi Lhc, limitinc c,%se of the possilulo of sucIi cracks. Such,. i cace -:~y arise if, bofore the a-fore- mentioned "imnenctra`ble obot~-.cic", the intcrval, -witli hi~-;h concentration of 'the oni_,'to not carriuad out, attains the dimensions of the entire slip plane zith rejpect to order of magnitude. A fori.,iula is written down for the i-,aximum ar-ount of tension. A quito simlilar result is obtained also on the basis of the theory of dislocations. Tihe relations written down in the present paper are considerably simplified in the case of zinc single cr-stals, becz~,.use one and the same basis plane is at the same time -the onlv slip plane and the only distinctly marked plane of cleavability. The crack will develop above all in that direction of (R) in -.-ilhich the local concentration o-f the expanding tensions is Createst in a homogeneous isotropic medium. Card 2/3 On the Brittle Rupture in Single Crystals of Zinc SOV/20-12~'~-2-1j/71 In the case of zinc this angle (a) will not be so 1-,-.r,~e. In conclusion, diagrams for the brittle rupture of amalgamated zinc single crystals at room temperature are given and discussed in short. There are 4 figures and 12 references, 6 of which are Soviet. ASSOCIATIO71: Institut fizicheskoy khimii Akademii nEtLik SSSR (Institute for USSr, Physical Chemistry of the Academy of Sciences, PRESEINMD: September 6, '1958, by P. A. Rebinder, Academician SUBINUTTED: June 7, 1958 Card 3/3 5 ( 4 *) AUTHORS: Kochanova; L. A., Andreyeva, I, A,? SOV/20-126-6-44/67 Shchukin, Ye. D. TITLE: On the Brittle Rupture of Pure and Alloyed Zinc Single Crys- tals (0 khrupkom razryve chistykh i legirovannykh monokrist- allov tsinka) PERIODICAL: Doklady Akademii nauk SSSR, 1959, Vol 126, Nr 6, PP 1304-1307 (USSR) ABSTRACT: In the papers (RL-fs 1-4) the authors investigated the rupture of pure zinc single crystals along the cleavage face (0001) and found that the product of normal and cleavage tensions is 2 constant - pctc = const = K . The results are given for tech- nical zinc and for zinc alloyed up to 0.5 % with Cd and com- pared with the results obtained for pure zinc (Table 1). Figure 1 shows the values of rupture tension for pure zinc at -1960 C and various angles between crystal axis and face (0001) as well as the effect of a mercury film upon the strength at +200 C. Table 1 shows that X increases with in- creasing amount of additions. Figure 2 shows the values of Card 113 rupture tension 'r for amalgamated and non amalgamated pure On the Brittle Rupture of Pure and Alloyed Zinc SOV/20-126-6-44/67 Single Crystals zinc single crystal in dependence on the crystallographic shear a. The characteristic break of the deformation curve at a0 (flow limit) as well as the increase in strength for a < a., connected with the latter are due to the increase of the incomplete shears (dislocation accumulation). ao de- creases with increasing amount of alloy components. Table I gives the degree of inhomogenefty f = ao/al (ao' refers to pure 0 zinc). As shown by figures 3 and 4, the experimental results are in good agreement with those obtained by A. Deruyttiere and G. B. Greenough (Ref 5). Pcr0 = K2 holds for both amalgam- ated and not amalgamated zinc single crystals of varying purity. The values for K are reduced by 50 O,~6' as a result of the reduction of the free surface activity a. The authors thank V. I. Likhtman for his advice. There are 4 figures, 1 table, and 13 references, 12 of which are Soviet. Card 2/3 on the Brittle Rupture of Pure and Alloyed Zinc SOV/20-126-6-44/67 Single Crystals ASSOCIATION: Institut fizicheskoy khimii Akademii nauk SSSR (Institute of Physical Chemistry of the Academy of Sciences, USSR) PRESENTED: February 17, 1959, by P. A. Rebinder, Academician SUBMITTED: February 10, 1959 card 3/3 24(2), 16(6) SOV/'2o 26 -2 -113/59 A _'T HORS Gorjunov, Yu. V., Pertsov,. N. V., Shchukin, Ye. D Rebinder, P. A., Academician TITLE: Variation in the Structural and wechanical Properties of the Single Crystals of Tin Under the Influence of a Strongly Ad- sorptionactive I'lledium PERIOLICAL: Doklady Akademii nauk SSSR, 1959, Voll 128, Nr 2, pp 269 - 272 (USSR) ABSTRACT: This article deals with 'he inflaence exercised by a thin li- quid gallium film upon the mechanical and structural properties of the single crystals of tin and upon their electrical con- ductivity. Dif-ferently oriented single crystals of tin (degree of purity 9.0.999 c,*/., diameter 0.5 - 1 mm, length 10-25 mM) were bred by the method of zone crystallization. The liquid me- tallic gallium was mechanically applied to the surface of the samples in a quantity of from tenths of a milligram to 5-10 mg. As in 1he case of Zn-Hg and other pairs mentioned al- ready earlier, plasticit.-i- and strength of the single crystals of tin decrease abruptly as soon as the gallium has been Card 1,14 a-,;P'-,-;ed zo the samole surface. However, tney decrease even V i !, t-ne S tr_~c tura I and I'llechanica 1 Propert ies SOV/2,~-' 28-2 -1 cf tine Single Crystals of Under the Influc~nce rf Li C.1-ongly Adsorptior- more in the course of time. After a fex days, the sample i_- pulverized. by tKe pressure of a finger-nail . A dJ~abgram 111a- strates the resultz: cbtainad by measurement off the true ten.siais of the break resulting from an of zhe ~allium- c3z,.:;ed z~na,e cr-stals o~ tin a-, a --on-stant veloci,:y ,fI\j2Qw.3' as a iunct~un of ~he peried of t-,:ne passed since the coating of the samples wituh gailium. The extreme relative pro- lon~a,ions increased by 30,/.j -'as a maxcim-,~..: val,;.c-' immedia-~ely after t;;e sam-Ples had been coated with calliuin. This percentage drcpped to some per cent, after thp sampleshad been exposed to rocm temperat_ire for 24 hours, and after some days It, was small, The strength of sinlgl-z! crystals coa-~ed with ,gailium, aacunts to -1-5 kg/mn,'- approxiz,ately immediately after the coating, and drops to 50 gllwim~ alter 7--;0 days, X-ray pirt-ires taken before and after the coating showed that afte-- ,h~_ coatin.a the single crystal gradaally decomposes into di- stinctly disorientr-d blocks. After some days the initial stains on the X-ray p-Lcture vanish almost completely, and the uic-are resembles that cf a ;~clycrystailine wetal. At a suff-i3ien-I Card -~_;antity of gallium and sufficiently long action of the !r~% r ~ ~ ~ 3 0 V, ` 2 o1 -2 8 - 2 - 13 / 5 9 1 it or, -::. t 1-,e Str.ct-,ral a.,-.d 1-lechanical Propert`t~s Df t ~-- e S e Crysta -'s of T in ~;nder the Inf laence off -- Stron-~ly -Adsorption- ac'-ive -edium latter on the single crystal of tin, this phenomenon extends throuzhout the entire crystal volume. In the case of samples oriented in such a manner that their original resistance is only small (i.e. at large angles ~ between the tEt-ragonal 0 [00~ axis and the sample axis), resistance increases In the course of time, while it gradually drops after the coating of samples with high original resistance (if the tetragonal axis is near the sample axis). Gallium for gallium saturated with tin) is a strong adsorbe-,,t for tin. During elongation in liquid nit.ro-en ~he strencrth. of samples coated with gallium really increases as-compared to single crystals without coating. The authors "hank Professor V. I, Likhtman, who contributed to a discussion of the results of this article. There are A. figures, 2 tables, and 27 references, 26 of which are Soviet, Card 3/4 Variati-on ir the Structural and Mlechanical Properties SOV/12o-128-2-13/59 of the Single Crystals of Tin Under the In.fluence of a Strc:i,-,ly Adsorpticn- 7 active i'..Ldium ASSOCIATION: Otdel dispersnykh sistem Instituta fizic~eskoy khimiii Akademii nauk SSSR (Institute for Disperse Systems of the Institute of Physical Chemistry of the Acade:.,iy of Sciences, USSR)Kafedra kolloidnoy khimii Moskovskogo gosudarstvennogo universiteta im. M., V. Lomonosova (Chair of Colloid Chemistry of 11.1oscow State University imeni M. V, Lomonosov) Sj3;7':IT'--TD: June 5, 1959 1 91 T-bO T -r.11. FER :PD'--,- AL., 32803 S/ '"71;S 1,*000/'012/124/i4g AGO t /A I C, I !,,A,,, LiKntrran, V.71 Ye.D.., Kor.-hanova, L.A., N,V and --~he rre-ha-,,Em of effe-.-, of Sma-1 surface ac- and, strenwt,~ proper-,tes of single Re f & r&, z-h-unittl . Me I urg iya . n--.,. 12. 196 i , ~~4--35, abs trac t 2 27 f AN 23, 147-161) w-re made alfferer--,-7~,;- cr-ler-j~--d Zn and Cd si-ngle 1 tr.,T n ~LTe:-.k-r. w-,-,h a *hln film of surface active Sn and m~ 1 1-', 5., It iEi s!7:otim :na- a., ~em,eri*~jre~ of "Dal!r- M--&.L-Z~Cating" rval-e~-*-1--!i. 'i7'6 Trecez.-,ca Ct -i me-,~a--- layer atrongly reduces and ~f -tie and bri-.1- failure. The vrit~le effes- ~f a~ '~-'vc- 15 a fz,2'~lnn of -t4emperature and tire def-=t0;,c- Emc-r-,t.:~lemer.-. ari reiu3ed strengr---- are not connected wr-l-, Tn-ei~o- .tj-. are caj~ed -y a --ecrear-r-- of -~.he -.q,:rk whi3h Is nC-:e:H-=!a-F -ne dae to ~,ne- c-f s-.1--face- "a r 32803 'Jug AOCEA101 a-ve rne-a-; c-. At a dr:p if the -,est ~em- I~eracl~ure 1-1-1 7 Of -t~ "'c-a~-e Te*A I- -C 'ria" s-j' ~:-- i~-s, ~,,he 'e.Thri-.t3 ing effe a t -C- IC- -11:~ a rl,~Itl of a~cme. The vanishes zrajitIiy, effel-r. v5z-.Fte~ a:~c- j5.. high temperatures ani lovi tenzll-i r.-:tIC-3, wh,~-n -n- cf def~rmi!it,-,on wicrc-hr-tercgereit'e5 and local strEsees -,~he falu.-e r-!~--Ief '-.-D In-z iangerouts cra,.-m's, even a It a z-:1- 4-e r i'-_ I eri:- eL2e -f frr:-.e engrg-;-. rhsr~- are 21 refererces. V. slr-1~5.-Icv rAb:tra.,~Er'~~ nc.,x- L 2jT[C-~-*,C- Cara RIPR 85 2 0-C' AUTHORS: Likhtman TIT LE: Surface t~oa of PERIODICAL: Uspekhi Q/071."'0/029/010/003'00,1 ~013/B075 V. L, and Sh,~iiukin, Ye. D. Phenomena in Processes of Deforma-tion and Destruc Metals 'I~o khimii, !960, VoL 29) No~ 10. pp. 1260~1284 TEXT: The suboect (-,'I the present survey -is the sc-called Rebinder effec.t. 1 rt %Vh K smal 1 quanti ties of surf a~!e ac t subst ances I!ccntained in the medium cr ir. the 'cody , tse-If - play a per t dur ing the def ormat ion and destru~%tirn t~f sc-lid bodies. This effect is caused by a decrease of the free eneTgy on new surfaces, which are formed during the deformation or dPstru,-,t,,cn of solid bodies due tc reversible (physical) adsorption. Adsorption'lessentially promotes the fcrmation ~;f these new surfaces and &-eTrs--a-s-e's- t-he effort necessary f,:r the deformation or destruction of bcd,es (Refs. ' '7). The authors point cut that the adsorption dependent change cf mechanical prcperti-es of the bodies is by no means related to s.,:rrcsion processes r;r to the dis3olution of the body. The action of adsorption on the deforma~.icr, -and stab-Ility projer-zies of solids is of Card 1/5 Surfac.e Phencmena in Prccessas of Deformat--on 'S/07A/60/029/010/003/004 and Destruction Cf ;1,1,etals BO!z)/BO75 practical impor*arlce for metal wcrking (Refs. 23, 26, 27), for powder production Oefa. 7. 8 , etc-, investigation of thc9e pheric'mena represenT,3 rart cf the new branch cf science the physic,.-) chemiCal m8chanirS of sol,ds~ This f',.e'd I of research being developed by P~ A. Rebinder and his ccilabcratci- has i~s origin at the boundary between mclecular physics, s~~, ,ri stare rhys-,rs, phys.cal chemistry. arid the me,.-hanics C-f the c~ortin U311s snpctrum~ Th-~ aim cf this branch -f scienre is the r).-cdu,,~ticn cf boj~es with given structure and properties as well as the- development of rat"onal metho I ods for the mechanical wcrkinE of solld bodies by Using physicc chemicai fa.-.tors (Refs. 6, 29). Mon-ocrystals of metals are most suitable for investigat-icri pur-peses.. For rhese cbje,~ts 1.t is of special importance to apply the recent theory of dislocations -,,o their present stage cf development. By this means the possibili;y is also offered to analyze the mechanism of media a-3ting on the deformation- and stabIlity characteristi,,~s of bodies (Refs' 13-1115, 19~, ~10). Some of these experiments are taken --nto snecial consideration: 1) Plastifi--ation of metal moron crystals under the action or organic surface-active media (Refs- 3-5. 05~ 10, !3. 14. 16 19 23 24, 3'~42),. Experimental data ccnfirm not only the adsorpti-cr chara~~.ter --f this effect but show also the same rules as with the at 1,.qu;d bcundary 3urfaces~ The plas~ifylng effect Card 21' 8 5 0- c-2, Surface Phenomena in Processes of Deformation 31/074/410/029/010/003/00z1 0 7, and Destruct4,.~n cf Metals B .5/B075 which is extremely complicated and varied, is cornected with a whcle spectrum cf aclivation energies and can be observed n different tempera- ture ranges as well as at different rates of deforma~icn. 2) Decrease of the free surface energy under the acticri of melting of more easily meitable metals than the material concerned (Refs. 6. 11, 12. 1.4, !5, !7~ cverninc, the 2' 22, 2A. 215. 29, 50~ 43-60. 69. 066)~ The rules - al-ti.~rl ~f these highly surfaze art,.ve me-dia were, studied in the Otdel disDarsnvkh sistem Instituta fizichesko.-v khimi--l AN SSSR (Denartment for Disperse Systems of the Institute of Physical Chemistry AS USSR) and at the kafedra kolloiancy khimil MGU (Chair of Collcidal Chemistry ,-,f Moscow State UnivarsitL._ it was shown that under the effect of an intenattly absorptive mad-lum a' highly plastic mGnocrystzil qualitaltively changes its mechanical prcperties and becomes brittle. Embrittlement de- pendF on tempera;ure and rate --,f deformaticn~ By -cmparir- The investigat- ed pair--si metal . coating with bnary meltability diagrams, a semi empirical rule could be set up., wh-.ch indicates whether the metal concerned is,with respect to another more difficultly meltable one, intensely surface-active or not. 3) ShLft of the cold -brittlenesd~limit in the presence of melted. h,),-h'ly a,~sorpt*.ve ~oattnas toward hiaher temr:eratures (Re4fs. 1-, 19, 23~ car,,] Sur fa I- e Ph e r, r-me v a in P roc c,; s e 9 -f De f o rmat i ~ n S/0 7A /60/ 02 9/0 1 O/Oo V00A an J De s t ru .7 t i o n -~ f Me t a I s K ' 31/ ,BO 7 5 2A 42 60) , i t can be -as s um-e fj t h a t '.. he na f, ura 1. anj -.1, e f Cr .- ed M i t c If ccill br it tieness have the same charac ter . I ts rel ativ,- posi t ion cr; the tampera-ur6 s-ale d9pends only cn the variability of the Darameter 0. V~ 4 ) Spon t -an P r u -q d L s per s i n-, c ~cur r L ng a t a 2o ns ide r ab le de crease cf t he 0 f rv~-e surfa~-s energy cf tne sc lid body with it.; low effective solubility in tte respective med ium (Refs. 13. 14. 24 . 52 , 62 6 4 ) . A cs R,~b I n d -, r has shc-wn. dispersion takes place in collo.,dal particles 6 of '0" cm, i~e~ , of the c-,rd-~r ef maan~tude cf the structure microunit7 However, the possibil-ties ct' this prcces5 are restr-".cted by ~,-he equil -.br:ium beLween the colloidal partl,-Ies and the substance being in the state of an effec- solliti cn., by the presence cf a charge on the particle surface, as w ell as b.-, the mi--~r~-,stru-ture cf the sclicl ccncerriedt Table 1 contains the maximum values of ~.he plaotifying effect and the ccrrespr-nding con::entrat 1,-n ..f ccmponent!~ f::r d iffFrenr organic surface- a~:tivq media. Table 2 *he exnpr:merital -f K and of the characteris~i: shi."t a which - . ~t- -- r(a), -cr-respc-ids the fra!-tion on curv for z:nc monocri.,s-z-al't --I~ffii-rent purltj degra&s ~,:-ating (at a e mp = r a t ur s c f I . qu . d ni-.-rcger-) -arid witb mercury :-catin- ,a- rocm rempexa- o ture.) (Ref. in Table 3 the rate cf stabilized -reep:ng cf zinc mono Card 4/5 8,;~ '2 C'2 Surface Phenomena in Processes of Deformation and Destructicn cf 111'etals ,:crystals withcul. r~cating (i~ and with tin cr-3ating 0j S~ T. Kishkin and Ya. M, Potak are mentioned, 6t". referen,-~es; 93 Soviet tables. and Japanese. ASSOCIATION: Otdel dispersnykh sistem Instituta AN SSSR (Department for DiSDarse Systems of Physical Chemistry "IS USSR) S/07Z/4O/O2r-'O'0/OO3/OO4 BOI`0075 (4) is given (Ref, 23) 0 - There are 13 figures, 11 British. 2 German, and fizicheskoy khimii the Institute of ~lx Card 51/5 S/020/60/133/01/19/070 B014/B011 AUTHORS: -Kochanova, L. A., Shchukin, Ye. D., Likhtman, V. I., -Rebinder, P. A., Academician TITLE: Origin and Development of Cracks in Deformed Crystals~ PERIODICAL: Doklady Akademii nauk SSSR9 1960, Vol. 133, No. 1, pp. 71-73 TEXT: By way of introduction, the authors subdivide the cracking of a crystal on stretching into two stages depending on the course of deforma- tion. In the stage A there occurs a slow formation and a gradual growth of the cracks at sites with high tension; in the stage B the crack quickly ex- tends over the entire cross section of the crystal. The authors discuss the basic role of shear in stage Ag and explain the origin of microcracks in this stage by the unification of dislocations and the formation of hollow nuclei. The mechanism of the development of cracks is closely examined, and V. N. Rozhanskiy (Ref. 7) is mentioned in a discussion of the position of the cracks in the lattice. The most probable arrangement is regarded to be the serial arrangement of dislocations in a lattice plane, which develop to Card 1/2 V12", Origin and Development of Cracks in Deformed 3/020/60/133/01/19/070 Crystals BO14/BO11 a crack on further deformation. Formula (1) is given for the length c of a crack, and formula (2) for the normal tension, From these formulas the authors derive the condition for the constancy of the product from normal tension and shear stress; this constancy is well proven by experiments. The authors tested the independence of expression (1) of expression (2). For this purpose they studied the development of cracks in amalgamated zinc single crystals. Microscopic analyses revealed inner cracks in the crystal plane (0001) of all samples. Relation (1) and (2) by Griffith were tested experimentally, and a few relative results are given. The authors state finally that the results obtained by them prove the universal character of the scheme worked out by them for the analysis of a crack development.4 There are 3 figures and 14 references: 10 Soviet, 3 British., and 1 Japanese. ASSOCIATION: Institut fizicheskoy khimii Akademii nauk SSSR (Institute of Physical Chemistry of the Academy of Sciences, USSR~- SUBMITTED- April 7i 1960 Card 2/2 63131 S/020/60/133/005/008/019 /P moo BO19//BO54 AUTHORS; Shchukin, Ye D-, Kochanova, L. A , Likhtman, V. I, TITLE: Some Special Features of Brittle Destruction of Metallic Crystals PERIODICAL: Doklady Akademii nauk SSSR, 1960, Vol, 133, No 5, pp io64 - lo66 TEXT: In the introduction, the authors refer to some of their own previous papers (Refs, 1 and 2). There, it had been clearly established that in the rupture of amalgamated single zinc crystals a spread of rupture stresses occurs along the basic plane (0001), If, for a given angle L between the plane (0001) and the sample axis, Pmin Q.) and PmaxQo) are the minimum and maximum rupture stresses for the angle then the relative quantity (Pmax - Pmin)/P max strongly increases with 0 increasing Zo, For Z.) 50', this quantity remains below 10%. for L< 30 it attains a value of more than 25%. To clarify these relations, the Card 1/3 83131 Some Special Features of Brittle Destruction S/020/60/133/005/008/019 of Metallic Crystals B019/BO54 authors carried out microscopic investigations of the basic planes (0001) of the fragments obtained in the rupture of many amalgamated single zinc crystals., The diameter of the single crystals L0was about 1 mm, 10 was between 20 and 700. Many steps were found (Fig. 1) in the surfaces of fracture which were caused by cracks on the transition from one (0001) plane into the other. Thorough investigations showed that the main steps appear in the places of origin of rupture cracks. In previous papers (Refs' 3 and 4). the authors gave a detailed theory of the origin of cracks, and here they q-uote formula ~1) obtained here: (P T 11121(p T )112 (P sin 3/2 Cos 1/2 ~) /(P sin3/2 Cos 112 sin '12 C CIA c c B C A c B To, Here, pC is the normal stress to the basic plane, T C is the shearing stress, the indices A and B refer to the type of fragment, and P C is the break stress, Fig.. 2 shows the experimental data, corresponding to (1), for six differently oriented samples. It appears that (1) is fulfilled in a wide range of orientation with an error of about 10%. From the results obtained, the authors infer the difference between the roles played by the Card 2/3 83131 Some Special Features of Brittle Destruction of S/020/60/133/005/008/019 Metallic Crystals B019/BO54 outer and helical dislocations in the mechanism of destruction, By a further investi.~ation of normal and shearing stresses in the rupture of a crystal it should be possible to solve a number of problems which are connected with the temperature- and velocity dependence of destruction There are 2 figures and 11 references: 8 Soviet, 2 German, and 1 US ASSOCIATION: Institut fizicheskoy khimii Akademii nauk SSSR (Institute of Physical Chemistry of the Academy of Sciences, USSR) PRESENTED: April 7, 1960j by P,, A. Rebinder, Academician SUBMITTED: March 29, 1960 Card 3/3 AUTHOR: -Shchukin, Ye. D. S/020/60/135/o6l/016/030 B006/BO56 TITLE: A Possible Mechanism of Slideline Forming in the Absence of Localized Dislocation Sources PERIODICAL:' Doklady Akademii nauk SSSR,,1960, Vol. 135, No. 1, pp. 61-64 TEXT. Th oblem of increasing dislocations during deformation of V pr crystalenas already repeatedly been dealt with, but hitherto no definitel solution could be found. Already 10 years ago, Frank and Read suggested I the model of localized sources of dislocations which has repeatedly been u.sed witho t, however, the occurrence of such sources having satisfactori-- U: I 1y been proven experimentally. The author of the present paper now su- gests another process of increasing dislocations. One of the possible variants is shown in Fig, 1. Under a stress applied to a crystal, a di s location itp is assumed;to spread, and part of it is assumed to go over to a slide lane located~parallel in -the immediate proximity, where, proceeding rom this new'loop, a dislocation field again spreads. This process is;deacribed in great detail, but on the basis of a denotation Card 1A ,-- C:-,- 003 F--~:-P,Ossible Nechanism of Slideline Forming in the S/020/60/13576-6-1/6i6/o3d Absence of ILocalized Dislocation Sources Boo6/BO56 -ABCD, which! has obviously been forgotten in Fig. 1. 40 45 Caid 2/4 50 '/020/60/135/001/016/030 IS B006/BO56 ! ~Card.~/ A Possible h1echanism of Slideline Forming in the Absence of Localized Dislocation Sources 84663 S/020/60/135/001/016/030 B~06/BO56 A possible~variant of the process of the splitting off of a dislocation loop of a parallel slide plane located nearby. I = the area covered by the dislocation loop in the initial plane; II = the area covered by the dislocation loop in the neighboring (higher).Plane. The arrow indicates the direction of the Bu**rgers vector b. The author finally thanks V. 1. Likhtman aAd V. L. Indenbom for valuable advice. There are 1 figure and 13 non-Soviet references. ASSOCIATION: Inatitut fizicheakoy khimii Akademii nauk SSSR i (Institute of Physical Chemistry of the Academy of Sciences ussRT- .. . I PRESEITTED:! June 14, 1960, by P. A. Rebinder, Academician SUBMITTrb:1 June 7, 1960 40 5 50 Card 4A 20797 I Ito, 11,12) 1 2 g G7 S/181 16110031003102VO30 Lt B 102/13205 AUTHORS: Kochanova, L. A., Shchukin,,-,Ye. D., and Likhtman., V. I, TITLE: Mechanism of coarse destruction of metallic crystals PERIODICAL: Fizika tverdogo tela, v. 3, no. 3, 1961, q02-910 TEXT: Studies conducted by the authirs in their laboratory have shown that the mechanical properties of metals can be strongly influenced by placing them in highly adsorbing media (fusion of fusible metals). Such a treatment results in a considerable decrease in plasticity and strength. In the papers of Academician F. A. Rebinder et al. on the effect produced by adsorp- tion from the ambient medium upon the mechanical Droperties of Solids, thesq effects have been ascribed to the considerable decrease in free surface energy on the boundary between the deformed metal and its saturated solution in the other liquid metal. This effect of the metal melt occurs immediately. Experiments have shown that the rule governing the deformation and coarse destruction of metals is not altered by the presence of the liquid metalt The study of the mechanism of coarse destruction of metals is, however, considerably facilitated by the use of active metal melts. The present Card 1/4 20797 S/181/61/003/003/023/030 Mechanism of B102/B205 papi~r includes a detailed discussion of experimental data relating to this subject. The data were obtained at room temperature for amalgamated single crystals of zinc.. Theoretical investigations have shown that the destruc- tion (rupture on elongation) of single crystals of metals can be divided into two stages: Stage A: More or less slow formation and extension of "embryonic" cracks .--it points of elevated concentration of stresses, caused by inhomogeneities ef plastic deformation. In this stage, the shear stress T plays the most significant role. The growth of the cracks is accompanied by the occurrence of new dislocations. Stage B: Rapid extension of an unbalanced crack over the entire cross section ~Tf the crystal. This process is predominated by the normal stress p. The critical relation between nor- mal stress and shear stress is given by pcTc = I 2Gd/L, where y is a dimen- sionless coefficient which differs only slightly from 1; G is the shear modulus, L the cross section of the single crystal, and a the specific free surface'energy. Furthermore, the relations c r 2L2 ~~ (1) and pc = a(EG/c )1/2 a I (G C/c 1/2 (2) hold; E_a = Go max max 2~r, max c is the length of the crack, E the elastic modulus, and P a dimensionless Card 2/4 20797 Mechanism of S11 8116 It 1003100310231030 B102[B205 coefficient of the order of unity. The two last-mentioned relations which characterize A and B, respectively,-mre experimentally verified independent- ly of each other. This was done by a study of the formation of cracks on an increase in D and T. The specimens (amalgamated single crystals of zinc) had a purity of 99.9~%, a diameter of 1 mm, a length of 10 mm, and showed different angles of inclination of the basal planes toward the axis of the specimens. The rate of elongation was constant and amounted to 12'~f./min. The stresses were determined from the relations P sin cos)(~ PC = P sin)(osin where P is the tensile stress referred 0 ~O 0 0 to the initial cross section, and is the angle of inclinaticii of the basal plane toward the axis of the specimenfor a given deformation E. The valid- ity of the function c max (x) was proved by a series of specimens with 210, and specimens withY 0 varying from 106 to 670 showed the correct- ness u: the relation (2) by 6riffith. A study of cracks of destruyed ppeci;-,.~ns has shown that the predominant role in the formation of destruc- ,tive cracks is presumably played by ang-ular or screw dislocations, V. 11. Rozhanskiy is mentioned. There are 5 figures and 31 references: 21 Soviet-bloc and 10 non-Soviet-bloc. Card 3/4 20797 Mechanism of ... S/181/61/003/003/023/030 B102/B205 ASSOCIATION: Otdel dispersnykh sistem Instituta fizicheskoy khimii- AN 33SH Moskva (Department of Disperse Systems of the Institute of Physical Chemistry of the AS USSR, Moscow) SUB?,'.ITTED: 26, 1960 Card Ir/4 SHCIIUKIN. Ye,.D.;.6MEiNOVA, M, Initiad -1a.3--ic c~eformati,:~r )-f metal ci7c-allo, 6 rio.5:78'1-7r"9 S-0 ;61. 7ic-:-A 1. Institut fizicheskoy khindi All SSSR~ (Defo-rmptions (Mechanics)) (Metal crystals) si 02011'-" 136/006, 021/024 3!01/B203 AUTHORS: Summ. B. D., Goryunov. Yu. V.. Pertso7j N. V., Shchuk"n, Ye. D., and Rebinder, P. A., Academician TITLE: Cracking in a bent zinc plate with local application cf a liquid surface--active metal (mercury) PERIODICAL: Doklady Akademii nauk SSSR, v, 136, no. 6, i96,, 1392-13,05) TEXT: The authors deal with tile problem of changing the mechanical properties of metals by the action of surface--active metals. The present paper reports an the action of small mercury drcps on cracking'in a bent zinc plate. Industrial zinc of the thickness 6 = 0.8-3 mm and' the width a of up to 50 cm was bent by a force F, as Is shown in Fig. 1. In the U was only about 7-8 kg/=2 (tensile place of Hg application, 'he stress om strength of Zn about 18 kg/MM2). in the absence of Hg, no considerable residual deformations occurred after 10 min; at a higher load, the zinc, could be bent at right angles. If, however, at a pm of a-bout '7 kg/mm2, an Hg drop (mass m about 0.2-.40 mg) was applied to the zinc surface Card 114 20644 S/020/6i/136'/006/0211/024 Cracking in a bent zinc plate with local ... BIOI/B203 polished by etching, a crack formed which, in A -_-,hcrt time (1-2 sa:~), adsorbed the entire Hg, and rapidly extended perpendicular to pm. The rate of extension decreased gradually, and was already -.-ery lc,-.,v after 5-10 min. The crack extended ovar the greater part -:f -.,.5 length thrcugh the entire thickness 6 of the plate. The final lengtl, L of the crack depended on the quantity of Hg. On the basis of conc--eEts of the migration of Hg along the cracked surface and the diffusion of Hg into the cracked surface, the authors derived for the length L: L - A6-2/3m 2/3 (A = const). This equation was confirmed expcrimentally. Cracking showed three stages. At the first stage, 'he rate of crackil-,g is constant and independent of m, the mass of the Hg drop. H- is adsorbed, and distributed over the crack, With increasing volume of the crack, the Hg is no longer sufficient to fill. it. This is the beginning of the second stage. Hg is distributed as a liquid phase only on the crack surface. The Hg migrates to the place of destrucrion, and diffuses into the crack surface at the same time. At the third stage, no -more liquid Hg is present. The slow growth of the slit tahes i) lace through migration, the Hg adsorbed on the slit -wall being redistributed. Card 2/4 S/020/61/136/006/021/024 Cr!Lcking in a bent zinc plate with local... B101/B203 According to the authors' opinion, a detailed analysis of migration and diffusion, and the reduction in strength of metals under the action of surface-active melts, can be studied by means of such experiments. Furthermore,' the kinetics and migration of adsorptive atoms will be studied. There are 4 figures and 4 Soviet-bloc references. ASSOCIATION: Mosl-ovskiy gosudarstvennyy universitet im. M. V. Lomonosova (moscow state University imeni M. V. Lomonosov). Institut fizicheskoy khimii Akademii nauk SSSR (Institute of Physical Chemistry of the Academy of Sciences USSR) SUBMITTED: November 5, 1960 Card 3/4 SU119-ly B.D.; GORYUNOV, Yu.V.; PERTSOV, N.V..; SlICRUKIN, Ye.D. Spread of mercury over a free zinc surface in connection with a study of strength reduction due to adsorption. Dok-l.AN SSSR 137 no.6.1413-1415 AP 161. (MIRA 14:4) 1. Moskovskiy goisudarstvennyy universitet Ameni M.V.Lomonosova. Predstavleno akademikom P.A.Rebinderom. (mercury) (Zinc) PHASE I BOOK EXPLOITATION s ov, 16 2 4 Likhtman, Vladimir Iosifovich,' Yevgeniy Dmitriyev'.c Pe'.-'r Aleksandrovich Rebinder- FIz-1-11--o-Ichimicheskaya mekhanika metallov; adsorbtsionnyye yavleniya protsessakh deformatsii i razrusheniya metallov (Physicochemi- Mechanics of Metals; Adsorption Phenomena in Processes of Deformation and Fracture). Moscow, Izd-vo AN SSSR, 1962.i. 302 p. Errata slip inserted. 7000 copies printed. Sporl.--,oring Agency: Alcademiya nauk SSSR. Institut fizicheskoy kft-.I'mii. Res--). Ed.: P. A. Rebinder, Academician; Ed.: N. G. Yegorov; Tech. Wl.s.: L. V. Yepifanova and Yu. V. Rylina. PURPOSE: This book is intended for scientific research workers and eng-ineers concerned with problems in the physicochemical mechanics of metals. Car-! 1/7 Fir-j.-!.i~ochemIcal Mechanics (Cont.) s o v/6 2 ViT -he results of investigations of the ad- The book reviews U ~..-'-rption effect, whichin its various manifestations, leads to F. and facilitation of metal deformation. in metal strengu general effect comprises the effects of several physico- .-emical factors affecting the mechanical properties of strained bodies; In the opinion of the authors, it deserves the alple.- !~-'ai attention of resear-3hers and production engineers, since a wledge of it will enable them to control the processes of deformation and fracture of metal and, consequently, to :-.,---i'rol the treatment of solids and particularly of metals. TEne ,.0-1ole complex of peculiar physicochemical phenomena which de- .--Y,ease strength through adsorption clearly reveals the effect. of .zarface energy and its changes on the behavior of the strained ,~,.)Iid body, which as a rule possesses various structural defe,--ts. authors express their thanks to Academician V. I. Spitsin of try, Academy of Sciences USSR,; Institute of Physical Chemisu well as to Candidates of Chenftcal Sciences N. V. Smirnova, Mq. Zakiyeva, and to Enginse.- Z. M. ZanozIna for theil, cooper-e- '-.1on and assistance. There are 295 references, mostly Soviet. 2/7 j/170/ /62/005/a07/005/010 133 1 DO 112 on of metals ~lo-_,; Cra ns z:nd Frain boundaries of hi,-:hl,,r adsorptizn-4ctive metallic meits 1)62, 86-)o zhurnal, v. 5, no. 7, o n -ie destruction of polycrystalline 2. t-,f zinc, c.. _-n i tin in the precence of Ca'liur. atil mercury, L a~ 'lie Institute of Phyaical Chemistry -a:' -.ic -in 'eb-: are re~)or'e.'- r e C i n of Ac. e7 Ti - -,der, icu, lar %t io _)ai i to the dlevelonment of transverse cracks in -~,-`ch io not occur in t';-.e a Iusence of adsorotion-active metals. _'_e lecre~:_-e in _-ti-enL-j'.i ic due no'. to intercrystalline corrosion but to lecrease in -,'.ie :;urface enerCj of the metals. There are 2 figures. -3 -2 nstftut fizicheskoy khimii A:11 SS3_H, :.-.oskva 'Instit-.te of I'l-lysical Chemistry AS USSR, Moscow) t 7.7TED Oc~ober 14, 1961 VI ~_:/.L 226/6 21/0 j 4100510081() 15 i-1 9 -i/ -~-i ~i-, AHTHOP:~:: I mill. I I.D., 4"orvilnov. Y1 I. V. , P-r-rt.-;ov, N.V. , I rat-71,-irl,v.yu. :1110 -11chilliln, Ye.0. T .'rofwagat i.km o I c va c 1~ ~z i n z L n cp] ot r.-s deformed in the prescitc- ol* in isolated molten drop at' .1 surf'ace-active w. 0 t a 1, PERIODfCAL: ViZLkJl 1110Lill 10V I 111Pta1_1OVedOlliye, V. 111, no. Ht)~'-, 757 - 705 I it cont. Lnuit ion Ot- Pir I ier work ( B. D. c~:umm et al D.tN S R , L t.) 6.1 ,L * i 0 , I -~ 1) t. I t epre.-ictl(. author.-; studied the ef'f'ect of' locally appliod drops of' ::iolten mercury and gallium on tile resis- tance oC zinc tO 1'ricture. Chn experiments vith mercury werv conducted at room temper.)Lure- on Lechnical grade, 98.7~/- piire,zinc specullells, 0.6 .0 1:11-,l thick ond it[) to 50 cin v.-ide. --~peclmells of' this tv'De 9~rippcd at une end ~n thr, horizontal position, could he . 1 0 bent through 90 without l'ormaLitin ol' visible cracks, in tile absence I of a surf-act-;ictive --mhstanco. LF, however, a drop (0.21 - 10 iag) at- Illorcill-y 1,~jls pj~%ced oil tAlp upper slirl'aCe of' tllv Lest piece in its ccntral title, 13~ - `;Omm 1'rom the t'ixed end, a crack was formed Card 1/4 11ropagation o1 cc,-ick~m5 .... 9 3/ E3 6 I beneath the mer~:i;vy drop when the bendin,-, moment .1;eached .1 vaLue pro (I uc i:ng a cwi I- a n L t en~z i 1, e ~- t t- es of' 17 - 0 kg/min_ (in tho ibsence Of nl(11*CL1l*V thi~~ stro- i;zis lmrolv suflicient to cause a slight pLastic straill ') 'I'll(- ccack absorbed aLl tile liquid mercurv in a 1'r,lCtiOll 01' ol ';PCOnd ~11111 CC)1lt LTlU(!d to increase at a r)rogrer-sively diminishing r.it n ill Liir, d i=r-ection. normal to the tensi Le stre ~4s its' -lerlgth 1, ill Lhe C.-I~c- oF a 4o mg rnercury drop) aCter I atia 240 sec bein,_ , ro~nect i ,-rl v. I L_* a rid 12 0 mal . Depending oil tile it] 11 S S 171 01' Lhe 11-0p, til(! til[10 t required 1'or the crack To reacli its i,inIL leligrLil from 15 min (Cor larger drops) to _-;e-ver-al klav.,; ki .or- !~m;ILI (Arops). increasing .171 and d ec r eas ing L It i c 1,.n c.-i --; d oi tile st~ccimen, 11 cl--cled; T: Ii e variation i-Ti c c) t i I d 'u e Lf es c r I b ed b v L ~ m -) at a constant d ..ccordillk, The ')-(,~;er-lt -lutilors tile Magnitude of' L was determined bv L~,o (~otjtjg pr-oc(",ise,~; a Spreading of tile inercury dvop ()it Lhe ol' Lite Ct-aCk Croill tile 110illt Of- cation toward- Lhic. ends; o1' the crack and b) I)elletration of tile nif-l-C111-Y illtkl thO VWL.1i thl-01.1,t-Al tile wal_f~q of' the crack. Equat ions were. d orl.rcul (I (,-c h L~ v1-% t it e iiin(~t ic s o f t 11 es e proc 0_!~ S C~z - P. lin I N's i S of' tile-se tiiat tile iatter process not (lite to Card 2/11 llropagoi.i(m of craci,!4 .... -I cc V I (-i-;i I. ed Vo I I I rn(! (I j V i,~)q ion .1.1 Olle I) UL was ;,. roiIl;ij It o I f: eve ra p roc w i I I Ch i I I c I 116"'i t I)(' f'o I I w"! ill i oriji.-i t i oil and growt Ii o C a tioLwork t)f till (- co c k s oii i t- %,r; 14 so V t h r- m;i i. ri c. ra c k .9 p r ca r! i n !,, o I' m , r-c i i r N, i. ri L 11 (-.S te c I- a c k s1) Vt ii e lilec 11 ani .9111 C.) V b0 t 11 c a pil 1 ary f I ow ;i nd t wo -d i ill rn s i olia 1. ill igra t i on formation ol' two- d im ens iona L (I e i cc L s on t. h c wa I I ~i r) I' t ii (-- ma in c rac Ic and s nr ead ing o f morcu ry oil t h c~L, e d e I cc t ~; 1) V t il illec liall isill o F t wo-d im erls ioll a I migra L. ion ; vo Lum e (I i ft LIS ion . I- t' I-) ending moment c ons id rrabl y Lon.-or than the ml-nimum t-equired to trigger-off thor, Process oF c i,ac k - I o rma t ion wa -~ a Im I i ed t o t 11 e. zinc ol a t e , mic roscop ic c rac lis brancllin,g-o r C t h f, ma i ri c rack w cre formed ; as a resu I t, the final len,gth oV the main crack decreased with increasing applied stress. This effect was particularly noticeable in experiments conducted a constant load ~,ls opposed to those conducted at a constant tensile stresIl;. i'he experiments with gallium w-erc conducted at 35 - 36 'C. In this czi~4e, there was a time lag between the apoli- C~Itioll of :Ald Col-illit,Lioll 01' ;1 crack in the zinc spocillien, the tiiie decreasLii.,I: %---ith incre;ising stress. The rate at which gallium Viii-f-i-I the crack i.-is relatively slow and tilt, rate of' growth C~ sharpl- -r deci-oased Vroi,.i the moment at which the entire volume of' the Card 'i/'/, I Voo5/mA/0, 9 llropzl~,,;ILion of' cl- icl~s . . . . I- q 3 71 ~-, gallium drop dr~t---;ri Croni the I)CCiIII41-11 Surface ii-11.0 tile Crack. Cracks Pormed uiltlel- tills lCtioll ot' li(JUid gallium had a stronger tendelICY LO branch of-C ~acl the relation.-ship between L and III W 11 s described by L - - m; ".,7,) . !'iiese dit-Terences were attribut ed to tile v f a c t t 11 a 1-1 t I i e ~; I I I t'a c c (,. -,I r, r g v o V z L n c I,, d ec r ea 5; ed In o r c 1) y ga I L i um t ha n b v In ca I- c i I I- v I I d T I I ~ i 1L u i (i 2: ~i I L i i, In n c o n t ra q T- t o in (? rc I I r y - did not on -i Cl,tr .-inc P71-cent bv the mechanism or surl'ace dit'Ful-41-011. 0,~!)CCiri4~nts 0, - ;I Sit-nitar nature %vere ZiISO COrIC1IICtf-(I 011 C-011111-MA. .(, wits obsnrved, in this Case, i-.-i tile ~).,-(--nce w' li,!uid mercury. Crackin~~ of' cadmium in cor.c.Ict viti,. lic;nid occurroft only at high loadin-7~ rates: f-well then, a cr,-Ick wt~~-: I .oi-liled OnLy j.1, tile cadinium specimen had been ill cont:Ict I%ritl-l I if:11i(i ~~;jj iii1jr, rot- cit It-ilst 2o mill bef'ore the stress was .1pol.jed. Lherc! are -5 1'igtires. ASSOCIATION: univorsitot in). -1.V. ~.,:Osccw ~-tnte Universitv in). Loplonw::)v 5 U 11,11 LTT " 1) ~-c Card 41338 S/02 0/62/146/003/016/019 B1 01 /B144 AUTHORS: Goryunov, Yu. V., Pertsov, N. V., Summ, B-. D., Shchukin, Ye. D. TITLE: Effect'of the microrelief on the rules governing the propagation of liquid metal on a solid metal surface PERIODICAL: Akademiya nauk SSSR. Doklady, v. 146, no. 3, 1962, 638-641 TEXT: 'Jhen the propagation of mercury on a backing of crystalline zinc freed from the oxide film by N.H was being studied, two types of propaga- 3 tion dependent on the microrelief were observed for the first time: wetting and diffusion. These processes diffet essentially in their mechanisms. On a smooth zinc surface the mercury forms as a drop with the edee of contact 'L$ - 70. A dull -spot propagates from the periphery of the drop, showing the time dependence r-tO-5 which is characteristic of diffusion processes. The mass m of the drop does not affect the propaga- tion velocity. For smooth zinc lamellas dipped obliquely into mercury, this velocity does not depend on the angle of inclination. The rate of 'bard 1/3 S/020/62/146/003/ol6/oig Effect of the microrelief B101/13144 diffusion increases with rising temperature owing to the temperature dependence of the diffusion coefficient: Dprf -'exp(-U/kT), where U - activation energy. On zinc surfaces roughened by etching with HNO 3 the mercury drop forms no constant edge of contact, and the spot propagates by the movement of the liquid Hg layer. The rise of Hg on rough surfaces depends on the angle of inclination of the surface and on the mass of the drop. r - (6m6a/n-%6)1/4t i /f4=Atl/4 holds, which is in good agreement with the experimentally determined dependence r rV t0-3. A a - a32 - (512 - 631' where a121 (320 a 31 are the specific free surface energies of the liquid at its interface with the medium, the solid at its interface with the medium and the solid at its interface with the liquid, respectively; TL - viscosity of Hg, 6 - density of Hg. If the smooth surface has a groove in the form of an isosceles triangle with the interior angle a, the fig will flow along the groove if ~< (180 - a)/2. Examination of the profilograms of differently roughened surfaces confirmed that wetting occurred instead of diffusion if arv1600. Conclusions: On an ideally smooth surface, and under the action of surface tension alone, a thin liquid layer will not spread as the migration of liquid.atoms Card 2/3 S/02 621146100310161019 Effect of the microrelief ... B1 01 YB144 reducos tho surface enerey of the solid ahead of the propagation front. If a surface has no microrelief, no wetting will occur. Similar studies might be of value for analyzing th.e propagation of liquids on liquid surfaces. There are 4 figures. ASSOCIATION: l,Loskovskiy gosudars-tvennyy universitet im. It. V. Lomonosova (moscow State University imeni M. V. Lomonosov) PRESENTED: May 23, 19062, by P. A. Rebinder, Academician SUBMITTED: May 15, 1962 Card 3/3 )rE. D. Disgert!,tion defenied for the A epree of Dortcr of Phygi~--,'-)mat'nerratical Scip,ices at the Institute of Physical Gheiristny of 1962: "Imrer-ti~7-tion of FLe--ulqrities and the Mechanism of the Effect of A,lsort)tionnl-kctiv~ Ketr-l Melts on the IMechnnical Projerties of Solid- metnlgz.ll .es lig-145 T,st. Ak-',. Nnu!, SSSE. No. 4, Moscow, 1963, pq,- s/o7o/63/008/001/011,/024 E139-/F,46o AUTHORS: Shchukin Ye.D., Kochanova, L.A., Pertsov, A.V. TITLN'. I'lie Comperature at which the transition from brittleness to plasticity occurs when the strength is Towered by absorption fiffects )~ristallografiya, v.8. rto.1, 1963, 69-74 TE.\T; It was shown earlier that single crystals of Zn, coated with a thin layer of 11g, show a brittle fracture , at roont temperature for very low strkiins becauae of the reduct on in strength by the absorption offect. Without fig, brittle fractiire oecurs only at low tentperatures, The brittleness is rr-~Uited ito the stability of a crtick. Here, rods of Zn of viirying puri~-y, 'with and without amalgamation, have been pulled at. a constant rat-e of deformation (10%/min) at temperatures from -200 to +2000C. The pl.asticity (limiting crystallographic slip) and strength K = (pj.)~2 where p. is the critical normal strai -n and -1--c the cr.1tical .5hear strain, are plotted against temperaturr . Tt seems that the differences are connected with the greater stroxigth of th(! pinning of' di-slocations in amalgamated Card 1/2 S/07o/63/008/001/011/024 The tomp~~vatui-a at vfhich ... nw/e46o crystals as a result rf the ab.,-;orption on to the dislocations of -ItOMS Cf Ng. However, the iziattar is not simple and it may be that lig only-fixes dt.-31ocaLions near gerowing cracks into which Hg atoms penatratte from U10 'gurface, tlhe riffects In the bulk of the materI&I beillf'r slllixlj SlrnUar phenomona bavo been observod with Zn cx-y.-5tal-s co-ited with Ga lout an accompanying development of plasticity did not take plac3. Uliere are 4 figures, ASSCC-TATION: h?stit-,vt fizicheskoy khitnii AN SSSR (In-.ititUtC Gf P11-:51.CV.1 Chemistry AS USSR) S(jFImTq~rrL): '-'ebruary 1A, 1962 Cart! 2/2' PERTSOV, A. V. ; PERTSOV, X. V. and SHCHUKIN, Ye. D. "About the Spontaneous Inner Dispersion of Me tals 'Subjected to the Action of Metal Fusions Considerable Lowering Surface Tension.0 report presented at the 3rd Conference of Higher'Educational Institutes on Strengtb and Plasticity of Metals,, Petrozavodsk State University , 24-29 Jum 1963 GORYUNOV., Yu.V.; SUM, B.D.; SHCHUKIN, Ye.D.; REBINDER, P.A., akademik Role of kinetic factors in the reduction of metal strength by adsorption. Dokl. AN SSSR 153 no-3:634-637 N '63. (MIRA 17:1) 1. Moskavskiy gosudarstvennyy universitet im. M.V. Lomonosova. R~'-'13111DER, ?.A., akademik; SHCHUHN, Ye.D.; RARGOLIS, L. Ya. Mecharical streng-.h of porous disperse bodies. Dokl. AN SSSR 154 no. 3:60,~.t-&;,8 Ja 164. (MIRA 17:5) 1. Institut fizicheskoy khim-ii AN SSSR i Institut khimiche3koy fiziki AN SSSR. i. PEPISOV) A.V.; MIRKIPI, L.I.; Ft'r'T-"C)V, N,V.~ SHCHUKTN, Ye.D~ Spontaneous diSpers-Lon -xnder ccinditims of a 2txortg'~y reduced free inter- pbase anargy. Dckl. AN' S&~R 158 no.5~1.166-11b8 0 '64. (M,IRA 17ilO) f urilvevaltHt Im. t/.l.'.LanonOqo-,,tL. Pre'd- A. Moskovskly gDf;udar:31,/enriy- stavic-no akademikor, P.A.Febinderim. IA ems i-W-1 v- I' Lrl the stability d-ivpezvec. porous mc atc-rivIg: ratulysts End scribents. Kin. i kat. J,11-Ag 165o 18 - 9 L 62537-65 alp(c) /DIP (k)AWT (d)/-F-IT (M) /RIP (b) e IFT Q'Pq ;ACCESSION NR: APS012647 AUTHOR: Shchukin, Ye. D.;,Kochanova, L. A.; Zanozina, Z. M. ~33 TITLE: The effect of microscopic surface flaws on the strength of Alass Soma: riziko-khimicheskaya mekhanika materialovi v. 1, no. 2$ 1965, 127-133 TOPIC TAGS: glass, glass property, breaking strength, flaw detection ABSTRACT:- The authors review previously published material on breaking of non- crystalline materials, especially glass under loadin The effect of structural 9 Idefects in glass.is studied by cr eating artificial microscopic defectsIin the sur- Iface layer', lowering the.resistance of the samples tested. Indentations were made in the center of ~5x 25 mm samples 1.3-1.4 mm thick and the resista nee of thesam-7 ples was measured. When indentations are made at various distances from tfie centeri the resistance of the sample grows with an increase in d1stance. The nature of dis_l tortion is studied microscopically. Two methcds are described to~separate the ef- I 4act of cracks and of the indentation itself from effects of residual deformation and stresses. The use.of the simple method of Imposing artificial indentations can- be ed to evaluate real defects in glass and help to determine equivalent charac- Card 1/2 VM !ACCESSION NR: AP5007560 S/002o/65/160/005/.1061/1064 'AUTHORS:' Shchukin, Ye. D.* Kochanova, L. A.; Zanozina, Z. M. ;TITLE: Some regularities in the influence of defects on the :strength of glass SOURCE. AN SSSR. Doklady., v. 160,.n6. 5, 1965; 1061-1064 ;TOPIC TAGS: glass, glass flaws, glass strength ~ABSTRACT: The purpose of this investigation was to-obtain a quanti- :tative description of the-effect of defects in the structure of. glas 8 , iby producing in its surface layer artificial microsco-ple derects ' Icausing a decrease in the strength of the sample, thereby imitating . 1real defects. Particular interest w .asattached to defects chara !t riz d b th t i l e e e concen rat on of residua y deformations and accordingly. 'by the stress concentration, so as to trace the influence.of such ' ;defects on the strength of samples. The defects were produced by prick-'Lng with a diamond indentor. Tests made on various sa les, MP i Card 113 L 58557-65 --- ---- ACCESSION NR: AP5007560 both accompanied and unaccompanied by annealing, and also.samples inj-,. which no other flaws existed other than those producedartifically, have shown that real defects existing in glass and determining its. resi-vtance to failure are equivalent to indentations made artift cially by a diamond, within a definite load interval. The results make it possible therefore not only to estimati~ the effect of real defects of the glass structure and express them in quantitative man- ner, but also to investigate the role that local concentration of strains and stresses can play in processes that lead to the failure of glass. The results haveja ilearing on efforts made by others to produce high-strength glass.0 .-'The,authors thank F. F. VitmanJLnd V. I. Likbtman for valuable advice and G. V, Kurdyumov, Yu. A. O_s1_pTy-a-n-,-V.- L. Indenbom, and V. I. - bbelyubskiy for participating in a df-scussion of EE_eresults.r__'T5j!s-report was presented by P. A. Rebinder. Original article has'.. 3 figures and 2 table s ASSOCIATION: Otdel dispe'rsnykb. sistem Instituta fiziche6koy khimii Akademii nauk SSSR (Division of Disperse Systems, Institute of Physical Chemistry, Academy-, of Sciences SSSR) 2/3 Card SUBMITTED: 18Sep64 NR REF SOV: 007 f - f 1 . I r ICard 3/3"