SCIENTIFIC ABSTRACT BERESLAVTSEVA, O.P. - BERESNEV, V.N.

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R000204810010-5
• Release Decision: RIFPUB
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: January 4, 2017
• Sequence Number: 10
• Publication Date: December 31, 1967
• Content Type: SCIENCEAB

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Elimlh'ationr ~ -~ of Chlorine From Zinc
Sulfate Solutions by Basic Bismuth
Sulfate

75387
SOV/i~R-~-5-1B/3~

AssoCIATION:

SUBMITTED:

theoretically required; i%e., 9 part is bismuth to 1
part chlorine. After the reaction, the electrolyte will
contain about 250 to 350 mg/liter dissolved bismuth.
The latter can be eliminated by neutralizing the solu-
tion with zinc oxide to a pH level of 4.5 to 5. and by
a subsequent filtration. A presence of l0 mg/liter of
bismuth in the electrolyte can be tolerated although
it contaminates the cathode zinc with bismuth. The
regeneration of the basic sulfate from bismuth chloride
is done with sulfuric acid under heating. The regenera-
tion is complete. There are 4 tables.

North Caucasian Mining Metallurgical Institute. Chair
of General Metallurgy (Severokavkazskiy gornometallurgiches-
kiy institut. Kafedra obshchey metallurgii)

Msrch il, 1959

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:'"'~ .... " - ' .........
. .:_~ : � 24/61/0 0 00 0 020

-~UTHORS; Loktionova, N.A., i~astvorova, N. M,, Bere~lavtseva~ �. P.
.:~' Larikova, M, I., Stroganov, O.B. ,.
~ L ,
TITLE: A Ne~v heat-treatment procedure for the .~Ll91alloy to maintain
,,' dimensional stability of castings,

SOU!R.C~.: Lite)myye al~-umlniyevyye splavy; svoystva, 'tekhnologiya plavki, ~t'ya
i tCrmicheskoy obrabotki. Sbornik statey. ~d. by I. N. Fridlyar~er
and M. ~. ~'~an. Moscow,, Oborongiz, 196t, 36-4Z.
.i
:' TE~T: The paper describes fl~e laboratory developmen= and industrial tes%ing
of a ne~ heat-tzea~ent procedure for AL19 parts of comolex configuration. The
,. procedure maintains a good stabilit~ of the geometric dimensions of the part
~roughout the coursa of She heat trea~ent. The labora:ory investigation consisted
essen~a~y of :he quenching of AL19 castings in water at differing temperatures (T}.
Thc cast spec~ens had a vari~b!e-section a~ular shape. They were quenched in a
}~orizontal attitude. Artificial (accelerated) aging was performed. Thc specimens
xvere oiaced into a furnace at 300�C, xvhereuoon the T wa~ raised to 535.~5�. After
9~u~g~, u~e.. T '-was :r~iSed to 5~m~~-additionaI ~-hr holdin

, ~2m'ecfi~nal thinnesses uP to 75x60 mm

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the ,AL19 alloy is practically insensitive to a reduction in the rate of cooling upon
quench. The mechanical properties of the castings in the freshly quenched state,
tested at room T, were practically invariable with an increase in water T from 45
to 96�, whereas in aged specimens tensile strength and relative elongation xvere
somewhat reduced thez-eby. The mechanical properties at lS0�C (shore-term iests)
were practically invariable with an increase in quench-water T up to 96� and were
also independent of the typ. e of heat treatment; (2) she total corrosional stability of
the -,%L19 alloy quenched in %rater is practically the same with quench-water T of 45
and 96�, both in the freshly quenched state and after artificially accelerated aging;
(3) the quenching of odd-shaped large castings in boiling water produces so insigni-
ficant a warping of the castings, that virpaally no straightening is required after
.',eat treau-nent. The adoption of quenching in boiling water for large odd-skaped
castings has provided a cardinal solution of the problem of warpage, kas reduced
the amount of labor required, and has increased the qualily of parts rr'..ade of ALI9
alloy; (~) quenching in boiling water does not require any additio:~al major equip-
mcn~ and does not alter in any way the procedural schedule of the production linc.
QuenchinL in boiling water can be done frith the uliliza%ion of oral;nary vats and re-
quires only a simple addition of equipment in ~,kich the wa:er is heated by means of
live steam, There are 2 figures, 4 tables, and 1 ~ussian-languxge 5ovic.: reference.

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............ ~ _ .. ~ ~ ~ ~:

,~O~/AO0 ~
AUT~0R: ~ Engineer
TITLE= Cause of %he Appear~ce of Bu~s ~d Cracks ~ Conta~ers M~e of

~e~ b~ se~ ~e~. ~be ~effeots appe=re~ baleen ~he ne~s w~th~ 2 - ~ monks

between ~e so-o~e~ ~-ph=se (R~R) ~ ~e
no~ sufflcien~ :o ensure :he :r~si:l~ of ~he ~-phase in~oa sol~d solu:ion,
..~e~eCore passes ~ ~ l~quid s~a~e, where
sep~a~ion of m~esium. M~esi~ reacts ~i~ ~e moisture con~ngd on ~e
surface of ~he par~s ~d wl~h moisture pene~ma~i~ in~o ~he dep~ of ~e alloy
alo~ ~e gra~ bo~d~les, M~nesl~ oxidizes ~d liberates ~ogen whi~ is

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s1~ 3516 ~1ooo10o21o0 810
AOO6/AO0~
Causes of the Appearance of Bulg/ngs and Cracks in Conta/ners Made of/~Hr6
Alloy by 3emu Nelding

accumulated in the region of the seams and exerts a local tensile effect entailing
the failure of the container. To confirm the aforementioned concepts the follow-
ing experiment was carried out. no "Amg6" and 1A~ (AMts) (Al-~n) specimens
were welded by hermetic seams. Specimen No. 1 was welded with water cooled rolls,
the moisture penetrating into the spaces between the seams. Specimen No. 2 was
welded In such a manner that moisture between the seams was eliminated; specimen
No. 3,_was welded with water. The specimens were than placed in a furnace heated
to ~O0�C and held at this temperature ~r 10 minutes. Bulglngs were revealed on
specimen No. 1 but not on the other two specimens. This shows that a chemical
reaction with hydrogen liberation had taken place in the first case; this reaction
did not occur in the two other specimens due to the absence of. moisture in the
2nd specimen and magnesium in the third one. The following recommendations are
given: When manufacturing AHg6 alloy containers the bottom cannot be welded with
two hermetic seams with an inter-space of 15 mm. The bottom should he welded-on
by one single seam. Thus the possibility of ~-phase separatlr~ out is reduced,
the grain growth in the weld-adjacent zone is diminished and efficiency is raised.

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AOO6/AO0!
Causes of the Appearance of Bulgings and Cracks in Containers Hade of A~ (AMg6) '
Alloy-by Seam Welding

In a two-row seam the distance must be 1 - 3 mm. Shunting of current is not to be.
expected, since during welding of the second seam on a ~l~-400-2 (~hShI-~O0-2)
machine it is sufficient to increase the pulse of the welding current by one gradu-
ation of the "pulse" ~0tentiometer to obtain the same width of cast zone for both
the first and second seams. If a distance between the seams should be over 1 - 3:
mm, then ithe second seam must be non-hermetic. Figure 1: :'.
The aforementioned conditions pertain to ar~v
sheet structures made of aluminum-magnesium '
alloys', having Closed regions 'formed 'by weld- i
lng. ." .-. : "- '

~-:- -.~ .'-'~ . . .... � .;.~-~ ~; i'
" .: '..':i_- '- - .':~;"

- ....... . ........

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'ii .

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3277~;

AOO~./AiO1
A~OR. _~snev~- A.S., ~g~eer

T~ S~ ~c~ological feat--s of t~ ~ld~ of st~ctu~s from

~IO~: ~aroc~o~ proizv~stvo, no. 1,-1~62, ~ _ ~
~ ~ auger in~atiga~s ~ s~cial featu~s-of ~ argon are
spot weld~g of~ lar~-size s~et st~ctu~s frem ~'al~ alloy ~d de-
scri~s ~ equi~nt u~ ~er ~ls pu~os~ ~ st~ctu~s consist of
~d ou~r ~acket of 2 ~d 1'.2 ~ s~et ~1 ~s~ctively, ~nforee~ ~ a'fra~-
work of 2 ~ s~et ~tal. ~ whole st~ctu~ is br~n do~ ~to ~c~ologicai
sections of 2,~ - 2,~ ~ leng~. ~ fre~s a~ ~lded to ~e l~er sheet
~tal Jacket on ~ ~H~ ~ (~~) ~lder. ~en ~e sections a~ Jo~ed
to each other by au~tic argon arc ~ld~. ~e i~er jacket is argon-arc
~l~d on automatics with t~gs~n electros wi~out filler wi~. ~s a~
P~n~d by limit~g ~ clear~ces ~'.t~en ~ ~oints: to 0.15 ~ for ~e
sheets, ~d to 0.1 ~ for ~e 1.2 ~ s~ets. ~e au~or gi~s a detailed de-
scription of welding t~ ~ctions, Jo~g the sections ~d ~ld~g the ou~r

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s / S lOOO /OO 1oo 1oo
Some technological features ... A00~/A101
Jacket. It is pointed out that also the ~T-600 (MShShT-600) and M~ -400
(~hI-~OO) welders can be used for welding the frames and ihe inner sheet metal
Jacket. ~ne automatic welding of the circumferential seams is carried out ~lth
tungsten electrodes and filler wire on a special installation developed' by Eng1:~
neet Ye.Ya. Belin and others at the plant [Abstraeter's nbte: the plan.t is not
named].: There are two reasons for using the filler wi~e: the difficulty of as-
sembling the sections with a clearance not exceeding Oel5 mm and the necessity
of rolling the seams without filler wire, since they are weakened by the saggi~
of the reverse of the seam. If weldlng ~s ca~rled out when power-supplied from
the first stages of the trarrsformer, it is expedient, for lne~asing the w$ider
capacity, to use eleetro$e ho'lders for twin electrodes. For welding the clrcum..
ferential seams of the Inner Jacket-and the longitudinal and circumferential
seams of the outer jacket, a rigid clamping of the blanks is necessary. 'l~er~
are 5 figures and 1 table.

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KALACHEV~ Yu.A.~ BERESNEV~ A.T.~ LUNEGOV~ D.Po

Performance of a kerosene cut~er usingliquefied gas. aaz.prom. 6 no.7:'
23-24 '61. (MIRA 17:2)

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Propane-c~ygen cutting by the K-51 petroleum torch. Svar.
proizv, no.7=37-38 J1 '61. (MIRA 14:6)
1. ~helyabinskiy .nauchno-tssledovatel~sk~.y institut tekhnologii
. ~nostroyeniya. (for Kalaeh.ev, Beresnev). 2. Chely~bizskiy
~ra~o.rnyy zavod ~for Luaegov).
(~as weld~-~ a=d cutting--Equipment and supplAes)

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KALACHE~, Yu.A., inzh.; BE~IEV, A.T., inzh.: SE~GEYEV, I.I., inzh.

Propane-butane cutting at the Chelyabinsk Pipe Rolling Mill. Svar.
proizv, no.3:36-37 Mr '62. (MT,~-RA 15:2)

1, Chelyabinskiy NIPTIAMMASh (for Kalachev~ Beresnev). 2. Chelya-
binskly truboprokatnyy zavod (for Sergeyev).
(Gas welding and cutting) (Chelyabinsk--Pipe tmills)

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LIVS~ITS, L.N.~ inzh.; PE~OV, V.P., tnz4.; VALGE, I.A., inzh.;
BERESR~V, A.T', inzh..

~anufaoture of welded beams of the V92-T aluminum allo~.~
Prom. stroi. 40 no.12:23-28 '62� (MIRA 15:12)

lo(forOhelyabinskiYLivshits), zavod metallokonstrukts~y imeni Ordzhonikidze
(Aluminum alloys) (Beams and girders)

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I

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~ Galtlvat~5 Plunts. F~u~. Bourbon. ~'u~. Te~.. M

: On Apple Pi~,'~:~ ~ Eio~ri~.,

~:~Io. ~"Ug. , Sa* ~ oBoe, od, ~9.~,g, No,~ 75-76

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A~THORS:~B_e?esne~v, B.I., Vereshchagin, v..F., Ryabinin, Yu. N.
moscow).
T~: Certain features of the theological behavio~ of metals
pressed t~ou~ a ~e by'me~ of a liquid ~der ~
press~e (without a plier). (Ob osobe~osty~
reologicheskogo novede~ya metallov, pressuye~
zhi~ost ' ~).
~IODIO~:"IZvestila ~ademii Ns,,k~ Otdelen~Fe Te~bn~ chesk~kh Nauk"
(Bulletin of the Ac.Sc., Tec~ical Sciences SeCtion)~
957, o.5, (u.s.s.a.)
~OT: ~essi~ of metals in the col~ state c~ be effected
either by mea~ of a pl~ger pressing agai~t the Work
or by me~ of fled ~er hi~ press~e. The f~st method
is at present ve~ ~dely use~ but owi~ ~o the very
friction forces be~een the material ~d the ~e walls
c~ot be applied to metals with hi~ ~$1d points. This
obstacle c~ to a certain e~en~ be elicited by us~g the
seco~ method, n~ely, pressing by me~ of the ~ostatic
press~e of a liquid. The here describe~ e~er~s were
~ 1/S c~ried out by the Laboratory of Super-hit Press~e ~ysics
of the Ac.Sc. (Laborator~ Fizi~ Sver~soki~ Davle~y
~ SS~) ~ represent one of the first attempts to obtain

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Certain features of the theological behaviour of metals
pressed through a die by means of a liquid under high
pressure(without a plunger). (Cont.
information on pressing metals by mean~ of liquids under
high pressure and to elucidate the influence of such a
method of shaping on the mechanical characteristics of the
metal and the features of the flow of the metal through
the die. This paper deals with the part of the study
relating to the theological behaviour of the materials
pressed by means of a liquid. For materialising the process
apparatus was built which permits pressing by means of
pressures up to 12 O00 atm. The upper limit of the
pressure is ~iven by the pressure which can be produced
the compressor built in the Laboratory. A photo of the
apparatus is shown in Fig.2, P.#9, whilst Fig.~ shows the
attachment for pressing the material through the die and
Fig.# shows the die geometry. The die was produced from
~JX-15 Steel heat treated to a hardness of 62 Rockwell C. 2
Fig.5 gives curves of the specific pressing pressure, p kg/cm
Card 213 against a deformation for alum~_nium and for copper using
dies with differing entering angles. Fig.6 shows the
dependence of the specific pressing pressure on the entering

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Certain features of the rheologica! behaviour of metals
pressed through a die by me.sma of a liquid under 'high
pressure (without a plunger). (Cont.) 2~-~-~/2~
angle for aluminium and copper, whilst Fig.7 shows the
dependence of the pressing pressure on P on the magn=itude
of the entering angle of the die. Graphs, Figs. S--10 give
theoretically calculated values, which are compared with
experimental results. Compared to the process of pressing
metals through dies by means of a plunger, pressing of dies
by applying h~aulic pressure has the following advantages:
the total pressing pressure is considerably reduced since
there are no losses caused by fraction in the cylindrical
part of the die; the resulting reduction in the total
required pressing force also leads to a reduction of the
friction coefficient between the metal and the die; the
reduction in the friction coefficient between the metal and
the die leads to a considerable reduction of the optimum
entering angle as compared to the optimum entering angle in
the case of pressing by means of a plunger. There are l0
figures and 9 references, all of which are Slavic.
SUBMITTED: March l, 1957.
ASSOCIATION: Laboratory of Super-high Pressure Physics of the
Ac.Sc. (Laborator~yaFiziki Sverkhvysokikh Davleniy AN SSSR)
AVA TV. ABIdE:

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" 80�/136 -58 -8-1~/27
AUTHORS: Beresnev, B.I., Vereshchagln, L.F. and ~yabinin, Yu.B.

TITLE: Installation for Drawing and Holling Metals in Freely
Rotating Rolls in a Liquid under High Hydrostatic Pressure
(Ustanovka dlya volocheniya i prokatki v svobodnc vrashcha-
yushchikhsya valkakh metallov v zhidkosti pod vysokim
gidrostatiche skim davlentyem).

PERIODICAL: Tsvetny?eMetally, 1958, Nr.8, pp. O1-83 (USSH)

ABSTRACT: Bridgeman(~ef.1) on the basis of investigations of the
effect of pressure on metal properties proposed and carried
out preliminary experiments on the rolling and drawing of
metals under hydrostatic pressure. B~idg~man (Ref.1) and
also the authors, working in the Laboratoriya fiziki sverkh-
vysokikh davleniy AN SSSR (Laboratory of Super-High
Pressure Physics of the AS USSR) (Ref.~), extended the
technique and noted the improvement of metal properties.
Special installations (Fig.l) have been used to compare the
two methods of deformation and served as the basis for an
installation produced by the authors for drawing or rolling
(idler rolls) metals in hydrostatic press,mres up to 10,O00
k~/cm2 (Fig. 2). The liquid is supplied by a laboratory

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Installation for Drawing and Holling Hetals in Freeiz Rotating oiis
in a Liquid under High Hydrostatic Pressure.

compressor rated at 5.8 litres/hour at 10,000 k~/cm2.
The conversion f~om drawing to rolling is simply effected.
The more important parts are made of heat-treated allo2
steels. The installation has been used for experiments on
the pressure drawing and rolling to various degrees of
deformation, but the authors do not give their results.
There are 2 figures and 6 Soviet references.

1. Metals--Processing 2. Rolling mills--Design
Metallurgical effects 4. Water--~pplications

3. Pressure--

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A~THO ereshchagln, ~,. F.; Ryabinin~ Yu. N.(Moscow)'
TITLE: Role of the Medium. in the Extrusion of Metals by Means of a
T'iquid under High Pressure (Rol' sredy pti vydavlivanii met-
alloy zhidkost'yu vysokogo davleniya)
PERIODICAL:
Izvestiya ~A~k~ademii nauk SS. SR= .Otdeleniye tekhnicheSkikh
nauk, 1958, Nr my, pp 1~-.146 (USSR)
ABSTRACT: Bridgman carried out experiments on extruding copper and
steel with a liquid under pressures of up to 12 000 atm. He
stated that he did not succeed in finding an optimum regime
for this process and, as a result of that, at very high
pressures the metal came out of the die in individual bits
instead of continuously~ Similar work carried out in She
Very High Pressure Physics Laboratory of the Academy of
~c~_e. nces;.U.SS.R~ has.shown that~hecorrect selection of the
mS=~zum WhiCh ~ransm~t~s the pressure determines $o a consider-
able extent not. only the magnitude of the pressure necessary
for effecting flow of the metal but also the quality of the
metal after deformation. Information gained during these
experiments is reported in this paper. The authors studied
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S0~/28-58-10-28/~8
Role of the Nedium in the Extrusion of Netals by ~eans of a Liquid
under High Pressure

the influence of various media~ which act both as a medium
for transmitting the pressure and as a lubricant, on the
pressure necessary for producing equal deformations. For
this purpose aluminium was extruded through a die with a
cone angle
~ = ~O� � The reduction was maintained constant
at 0.775. The method was the same as that described in earl-
ier work (Ref.2). The following results were obtained:
Liquid transmitting pressure !'Pressure at which the
flow of begins

Transformer oil
55oo
Transformer oil ~ kerosene 6500
Transformer oil , ~erosene 6~50
~ oleic acid (0.~9~0.~9+0.02)
Kerosene
Gasoline 6900
6900
Nethylat ed spirits 6075
Card 2/# Ethyl alcohol 6~50

Surface
quality

Satis-
factory

!!

I!

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S0�/2~-58-lO-28/5#
ROie of the Nedium in the Extrusion of Netals by Neans of a Liquid
under High l~ressure

Table~ont inued~
Liquid transmitting pressure

Water
Water + a layer of hypoid
lubricant applied to the
surface of the specimen

~Pressure at which the Surface
flow ofsetal begins quality

5500 Good
5000 Excellent

On the basis of the obtained results, the following conclus-
lens are arrived at:
l) The pressure necessary to produce a flow of the metal as
well as the surface quality of the deformed metal are greatly
dependent on the fluid used.
2) It was found that plating of the specimen with a thin layer
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sov/24-58-1o-28/~
Role of the Medium in the Extrusion of Metals by ~eans of a Liquid
under High Pressure
of a tin-lead solder reduces considerably the pressure nece-
ssary for extrusion.
3) Optimum conditions of ex~b~rusion were determined,by means
of which a high surface qUality can be obtained~ namely, by
applying a thin layer of hypoid lubricant on a specimen which
is extruded by means of water.
~)' It was found that if the wrong liquid is applied this can
lead not only to damage of the surface of the extruded metal
but also to its complete destruction. There are i table, 1
figure and 6 Soviet references�
ASSOCIAT~N: Laboratoriya fiziki sverkhvysokikh davleniy AN SSSR~
Institut fiziki metallov~ AN SSSR (Laboratory of Physics of
Very High Pressures, Academy of Sciences USSR, Institute of
Netal Physics, Academy of Sciences USSR).
SUB~MITTED: Nay 27~ 1958.

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'll~R~lig~'.,-lloI.~ FERESHOHAOIN, L.F.I ltIABiNIN,

Extrusion of pt!ess and l~art~ of complex profile By ltquld under
h.t~h Pressure, Inzh.-fiz.zhur. no.11:105-109 N

1~ Lab~ratortya
Moek~a, ! Ins~itut ftzlki ~etallov AN $$8R, g. Sv6rdlovBk.
(Extrusion

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BERESN%W, B.I., Cand 'X'ech ~ci-- (diss) "Conditions
of flow and change ~ the mec~mnical properties of metals

in their extrusion with a high-pressure liquid.. Mos, 19~9,

12 pp (Acad Sci USSR. Inst of Physics of High Pres2ares)
150 copies..~ibliogra~hy: pp 11-12 (~titles) (KL, 33-59, 1~)

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SOY/179-59-1-19~36
AUTHORS:Beresnev, Bo I., Vereshchagin, L. F., Ryabinin, Yu. N.(Moscow)
TITLE: The Extrusion of Metals by a Liquid Under High Pressure (0
-o-davlivanii metallov zhidkost'yu, nakhodyashcheysya pod
~sokim davleniyem)
PERIODICAL:. Izvestiya Akademii nauk SSSR, 0tdeleniye tekhnicheskikb.
nauk, ~ekhanika i mashinostroyeniye, 1959, Nr 1, pp 128-151
(USSR)
ABSTRACT: "The paper is a continuation of earlier work (Ref.2). ~x-
trusion of a metal by a liquid under high pressure is an im-
provement over ex~rusion by a plunger, since much of the
friction at the walls of the container is eliminated. Ex-
periments were carried out on aluminium AD-I, copper
duralumin D-iM and alloy A~MG. The degree of deformation

was measured as

or as

where
Card 1/2 do

D is the initial diameter of the metal cylinder, a~d
is the diameter of the extruded metal. Curves are given

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so~/iYR-59-1-19/56
The Extrusion of ~etals by a Liquid under High Pressure

for ~ and Sf as functions of pressure and the effect of
the angle of the cone which reduces the diameter from D
d is _ ~e~tl~ted~ Mlcrohardness measurements on
cSpper ~ ' ' � '
=~=uaeG oy =ne p�unger method and by the liquid
pressure method show that the �pper produced by the latter
method is the more uniform. There are $ figures, i table a.,~
8 Soviet references.
SUB~,~ITTED: April 15, 1958.

Card 2/2

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sov/l
AUTHORS: Beresnev, B.I., Vereshchagin, L.F. and Ryabtnin, Yu.N.

TITLE: The Influence of Hydrostatic Pressure on the Change in
~echanical Properties of Aluminium After S~ong Plastic
Deformation (0 vliyanii gidrostaticheskogo davlenlya na
izmeneniye mekhanicheskikh svoystv alyumlniya posle bol's~ikh
plasticheskikh deformatsiy)

PERIODIOAL: Fizika MeSallov i Metallovedeniye, 19~9, Vol 7, ~r 1, pp 128-152 (USSR)

ABSTRACT: During plastic deformation a change of the fine structure
of metals occurs and new micro-defects of the crystal lattice,
as well as those already presen~ develop. Such development
of micro-defects in a definite stage of deformation leads to
the formation and propagation of macro-fractures. Under
conditions of hydrostatic pressure the formation and develop-
ment of micro-defects during plastic deformation is not only
rendered more difficult, but an intensive self-healing process
of the existing defects in the crystal lattice takes place
(Her.l), and these effects have an important bearing on the
Oard 1/4 plastic flow. It has been shown that the plasticity of

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S0�/126-7-1-18/28
The Influence of Hydrostatic Pressure on the Ohange in Mechanical
Properties of Aluminlum After Stmmg PlaStic Deformation

materials increases sharply if they are deformed at high
hydrostatic pressures� The authors have c~rried out a
study of the extrusion of a number of non-ferrous metals and
alloys by liquid under high pressure. The method of such
an extrusion process~ ~the theological effect accompanying
the flow of metal through the die and the nature of the
change in mechanical properties of the metal extruded by
liquid has been described by Beresnev (Refs~9,10)o However,
it was also necessar2 to find a means of deforming metal
parts to the same extent using various pressures. Extrusion
of step-shaped specimens made it possible to solve ~his problem�
The essenee of this method is shown in Fig. lo The three
specimens have different diameters� The diameter de~ermines
the pressure at which metal flows through the dye. Thus it
Is possible to obtain data of the influence of three different
� pressures on work-hardening by bringing about three different
" degrees of defOrmation� The mechanical properties of
aluminium (ADI) as annealed are shown in Table on p 130.
Card 2/4 From the curves of Figo2 it is possible to calculate

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The Influence of Hydrostatic Pressure on the 0hange in Meohnnical
Properties of Al~i~ After S~ Plastic Deformation

usual properties, UTS, yield stress, relative elongation,
final reduction in area and the coefficient of uniform
reduction in area� In Figs.3~ 4 and � the relationships
between three characteristics of plasticity (final reduction
in area, relative elongation and coefficient of uniform
reduction in area) and extrusion pressure are shown. It
was found that all these characteristics which determine
the plasticity of a~uminium increase with increase of
pressure. As regards the influence of pressure on the
strength of the metal, a few conclusions can be arrived at from
~ ~.