Effect of pre-strain and reheating on isothermal α′ martensite formation in Fe-25.5Ni-4Cr austenitic steel

被引：1
作者：
Nihei, Y [1 ]
Hiraoka, Y [1 ]
Kagaya, Y [1 ]
Kohno, Y [1 ]
Shibata, K [1 ]
Ohtsuka, H [1 ]
机构：
[1] Muroran Inst Technol, Dept Mat Sci & Engn, Muroran, Hokkaido 0508585, Japan
来源：
JOURNAL OF NUCLEAR MATERIALS | 2004年 / 329卷
关键词：
D O I：
10.1016/j.jnucmat.2004.04.097
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of pre-strain on alpha' martensitic transformation was examined for Fe-25.5Ni-4Cr austenitic steel. alpha' martensitic transformation was gradually suppressed with pre-strain up to about 10%, but was contrarily enhanced with pre-strain over about 10%. Specimens pre-strained to 10% and 30% were reheated to clarify the mechanism of suppression and enhancement on alpha' martensite formation. The diffusion activation energy of component atoms in this steel was obtained from the relation between the amount of alpha' martensite and the reheating time. In specimens pre-strained to 10%, the apparent activation energy is fairly close to the diffusion activation energy of C in austenitic steels. In specimens pre-strained to 30%, the apparent activation energy is close to the diffusion activation energy of Ni and Cr in austenitic steels. The suppression and enhancement of alpha' martensitic transformation is attributed to diffusion of C, Ni and Cr in Fe-25.5Ni-4Cr. (C) 2004 Elsevier B.V. All rights reserved.
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页码：648 / 651
页数：4
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