Change in the ductility characteristics of austenitic steels during deformation at different rates
The present study investigates the ductility of stable austenitic steels 07KhI3AGI9N5 and 12KhI8N22T and metastable austenitic steel 03KhI3AGI9.
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| Published in: | Проблемы прочности |
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| Date: | 1985 |
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| Format: | Article |
| Language: | English |
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Інститут проблем міцності ім. Г.С. Писаренко НАН України
1985
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| Online Access: | https://nasplib.isofts.kiev.ua/handle/123456789/182864 |
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| Cite this: | Change in the ductility characteristics of austenitic steels during deformation at different rates / E.T. Shinkarenko // Проблемы прочности. — 1985. — № 8. — С. 1099-1101 . — Бібліогр.: 6 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1860077838318698496 |
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| author | Shinkarenko, E.T. |
| author_facet | Shinkarenko, E.T. |
| citation_txt | Change in the ductility characteristics of austenitic steels during deformation at different rates / E.T. Shinkarenko // Проблемы прочности. — 1985. — № 8. — С. 1099-1101 . — Бібліогр.: 6 назв. — англ. |
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| container_title | Проблемы прочности |
| description | The present study investigates the ductility of stable austenitic steels 07KhI3AGI9N5 and 12KhI8N22T and metastable austenitic steel 03KhI3AGI9.
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| first_indexed | 2025-12-07T17:15:17Z |
| format | Article |
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2. G. I. Kanel', The Use of Manganin Sensors for Measuring the Shock Compression Pressures
of Condensed Media [in Russian], Moscow (1974), Manuscript deposited in the All-Union
Institute for Scientific and Technical Information, No. 477-74 Dep.
3. A. V. Anan'in, A. I. Dremin, and G. I. Kanel', "Polymorphic transformations of iron in
a shock wave," Fiz. Goreniya Vzryva, No. 3, 93-102 (1981).
4. G. I. Kanel' and E. N. Petrova, "The strength of VT6 titanium under conditions of shock-
wave loading," in: Detonation: Materials of the Second All-Union Conference on Detona-
tion, Chernogolovka (1981), pp. 136-142.
5. Ya. B. Zel'dovich and Yu. P. Raizer, Physics of Shock Waves and High-Temperature Hydro-
dynamic Phenomena, Academic Press.
6. S. A. Novikov, I. I. Divnov, and A. G. Ivanov, "An investigation of the fracture of
steel, aluminum, and copper in explosive loading," Fiz. Met. Metalloved., 21, No. 4,
608-615 (1966).
7. L. M. Barker and R. E. Holleenbach, "Shock wave study of the phase transition in iron,"
J. Appl. Phys., 45, No. ii, 48~2-4887 (1974).
8. W. H. Gust, D. J. Steinberg, and D. A. Young, "Hugoniot parameters to 320 GPa for three
types of steel," High-Temp.--High Pressures, ii, No. 3, 271-280 (1979).
9. G. V. Stepanov, "The split-off fracture of metals by plane elastopla~tic loading waves,"
Probl. Prochn., No. 8, 66-70 (1976).
I0. G. I. Kanel', "The resistance of metals to spilt-off fracture," Fiz. Goreniya Vzryva,
No. 3, 77-83 (1982).
ii. A. N. Dremin, G. I. Kanel', and O. B. Chernikova, "The resistance to plastic deforma-
tion of ADI aluminum and DI6 duralumin under conditions of shock compression," Zh.
Prlkl. Mekh. Tekh. Fiz., No. 4, 132-138 (1981).
CHANGE IN THE DUCTILITY CHARACTERISTICS OF AUSTENITIC
STEELS DURING DEFORMATION AT DIFFERENT RATES
E. T. Shinkarenko UDC 620.17:669.14
It is widely believed that an increase in strain rate leads to an increase in ductility.
This is indicated, for example, by the data in [i, 2].
The results of other authors make it possible to suggest that the ductility of steels
decreases in the transition from static deformation to dynamic straining [3-6].
The present study investigates the ductility of stable austenitic steels 07KhI3AGI9N5
and 12KhI8N22T and metastable austenitic steel 03KhI3AGI9.
Aften an austenizing quenching (6- and 7-point grain size), the steels were tested in
tension at 20 and --196~ at strain rates from 1.7"10 -4 sec -a to 5"i0 z sec-*.
The ductility of the steels was evaluated from the quantities e~ and E@p, which were
found from the equations
1 . 1
where e~ is the total plastic strain (true strain after fracture); @ is the reduction of
area of-the specimen after fracture; ~ is the uniform plastic strain (true strain at the
moment necking begins); ~p is the reduction of area of the specimen at the moment necking
begins.
It was established from the study that the ductility of the structurally stable steels
is reduced by a transition from static deformation to dynamic deformation at 20~ (Figs. I
and 2).
There is a similar change in the ductility of steel 03KhI3AGI9 under these conditions.
with the Y ~ E-transformation occurring in this steel during deformation at rates e < i0 -*
sec-* [51.
Leningrad Polytechnic Institute. Translated from Problemy Prochnosti, No. 8, pp. 57-
59, August, 1985. Original article submitted July 18, 1983.
0039-2316/85/1708-1099509.50 ~ 1986 Plenum Publishing Corporation 1099
: ' ~ - - E~ I
"- ~ "20"C
.. -Ig6 /
'~-" 10-2 lO o
S t r a in
5.102
r a t e ,
Ln: 1 %
0,6
0,4
ol
iO, -4 f3-~ ;0 o 5432
see-I
i/ I
;96
:-.-', !O-Z 10o 5.102
,p
- ;gS*C
�9 20 ~ ' : ' ~ c-- - . - - >--.<>~.-...o...~ "~
4 I
i
1~-~ ;0-2 10 o 54,22
- I
St r a in r a t e . s ee
b
zn~
1,2
1,0
28
tO-4 10-2 I0 o 5.102 0-4 i0-2 tO o 5102
St ra in r a t e , sec -1
C
Fig. I. Effect of strain rate and test temperature on
the total Er and uniform E~D plastic strain of structurally
stable steels 07KhI3AGI9N5 ~a) and 12KhlSN22T (b) and me-
tastable steel 03KhI3AGI9 (c).
A decrease in test temperature to --196=C yields different relations. With an increase
in strain rate (E > 10 -I sec-1), the (total) plastic strain of the stable and metastable
steels increases. The increase is greatest (a little more than threefold) for steel
03KhI3AGI9.
The uniform plastic strain of the structurally stable steels decreases, while that of
steel 03KhI3AGI9 increases. This is evidently connected with a redistribution of the de-
formation zones along the specimen due to phase transformations.
How can one explain the increase in the total ductility of the austenitic steels with
hlgh-rate deformation at --196~
ii00
-,2o . . . . . 1 - - - !
-s~ J %nl_/_l I
O 10 ~ 30 40
Coo]ing time, sec
F ig . 2. Change over time in the tem-
perature of the center of a specimen
(~-- 4 mm) cooled in liquid nitrogen.
Heating may occur during deformation -- especially at high rates. The temperature in-
crease may be due to the strain work being done, 93-95% of which is ultimately converted into
heat. Dissipation of the heat into the environment depends on many factors, including the
time of deformation. The higher the strain rate, the less time available for heat to be
dissipated into the coolant liquid. Thus, other conditions being equal, the final tempera-
ture of the specimen must be higher.
If we assume that the specimen temperature (in the deformation zone) does increase,
then the actual temperature of the deformed specimen will be different from the temperature
of liquid nitrogen.
Calculations showed that the total time of deformation to specimen fracture at rates
E > i0 ~ sec -I is less than I sec. At E = 5"10 ~ see -I, tde f = 0.0006 sec [5].
Test data on the temperature of specimens cooled in liquid nitrogen shows that the tem-
perature of the central layers of the specimen is --196~ (Fig. 2) 20 see after the beginning
of cooling.
Comparing the total time of deformation and the specimen cooling time, it can be noted
that at high rates (c > 10 -I sec-1), the heat released during deformation raises the tempera-
ture in the deformation zone and thereby affects the ductility of the steels.
Thus, the ductility of austenitic steels 07KhI3AGI9N5, 12KhlSNI22T, and 03KhI3AGI9 de-
pends on the strain rate in the following manner. There is no change in ductility in the
rate interval 1.7-i0-~--1.7"i0 -~ sec -I. With an increase in the rate (r > 10 -I see-l), duc-
tility decreases at room temperature and increases in liquid nitrogen.
The increase in the ductility of the steels in liquid nitrogen at ~ > 10 -I sec -I is
connected with a change (increase) in specimen temperature during deformation, which changes
not only the thermal conditions for plastic flow of the austenite, but also the conditions
for the martensitic transformation.
For metastable steel 03KhI3AGI9, these changes have the greatest effect on the increase
in ductility at the temperature of liquid nitrogen.
le
2.
3.
4.
5.
.
LITERATURE CITED
D. S. Clark and D. S. Wood, "The tensile impact properties of some metals and alloys,"
Trans. Am. Soc. Met., 42, No. i, 45-74 (1950).
D. S. Clark and D. S. Wood, "The time delay for the initiation of plastic deformation
at rapidly applied constant stress," Am. Soc. Test. Mater. Proc., 49, 717-735 (1949).
V. A. Delle and A. V. Noskin, "Effect of loading rate on the ductility of certain
materials," Inzh.-Fiz. Zh., ~, No. 6, 36-40 (1959).
Ya. B. Fridman, Mechanical Properties of Metals. Deformation and Fracture [in Russian],
Vol. i, Mashinostroenie, Moscow (1974).
E. T. Shinkarenko, "Investigation of the effect of strain rate on the properties and
phase transformations of certain cryogenic steels," Author's Abstract of Candidate's
Dissertation, Engineering Sciences, Leningrad (1976).
H. G. Baron, "The effect of strain rate on tensile stress--strain characteristics of
metals and some practical implications," Sheet Met. Ind., 39, No. 420, 257-260 (1962).
i i 0 1
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| id | nasplib_isofts_kiev_ua-123456789-182864 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 0556-171X |
| language | English |
| last_indexed | 2025-12-07T17:15:17Z |
| publishDate | 1985 |
| publisher | Інститут проблем міцності ім. Г.С. Писаренко НАН України |
| record_format | dspace |
| spelling | Shinkarenko, E.T. 2022-01-22T18:43:31Z 2022-01-22T18:43:31Z 1985 Change in the ductility characteristics of austenitic steels during deformation at different rates / E.T. Shinkarenko // Проблемы прочности. — 1985. — № 8. — С. 1099-1101 . — Бібліогр.: 6 назв. — англ. 0556-171X https://nasplib.isofts.kiev.ua/handle/123456789/182864 620.17:669.14 The present study investigates the ductility of stable austenitic steels 07KhI3AGI9N5 and 12KhI8N22T and metastable austenitic steel 03KhI3AGI9. en Інститут проблем міцності ім. Г.С. Писаренко НАН України Проблемы прочности Scientific-technical section Change in the ductility characteristics of austenitic steels during deformation at different rates Особенности изменения характеристик пластичности аустенитных сталей при деформации с различными скоростями Article published earlier |
| spellingShingle | Change in the ductility characteristics of austenitic steels during deformation at different rates Shinkarenko, E.T. Scientific-technical section |
| title | Change in the ductility characteristics of austenitic steels during deformation at different rates |
| title_alt | Особенности изменения характеристик пластичности аустенитных сталей при деформации с различными скоростями |
| title_full | Change in the ductility characteristics of austenitic steels during deformation at different rates |
| title_fullStr | Change in the ductility characteristics of austenitic steels during deformation at different rates |
| title_full_unstemmed | Change in the ductility characteristics of austenitic steels during deformation at different rates |
| title_short | Change in the ductility characteristics of austenitic steels during deformation at different rates |
| title_sort | change in the ductility characteristics of austenitic steels during deformation at different rates |
| topic | Scientific-technical section |
| topic_facet | Scientific-technical section |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/182864 |
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