Effect of Carbon Fraction on Stacking Fault Energy of Austenitic Stainless Steels

被引：0
|
作者：
Tae-Ho Lee
Heon-Young Ha
Byoungchul Hwang
Sung-Joon Kim
Eunjoo Shin
机构：
[1] Korea Institute of Materials Science,Ferroy Alloy Department
[2] Pohang University of Science & Technology,Graduate Institute of Ferrous Technology
[3] Korea Atomic Energy Research Institute,Neutron Physics Department
来源：
Metallurgical and Materials Transactions A | 2012年 / 43卷
关键词：
Martensite; Martensitic Transformation; Austenitic Stainless Steel; Neutron Diffraction; Stack Fault Energy;
D O I：
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学科分类号：
摘要：
The effect of C fraction (C/N) on stacking fault energy (SFE) of austenitic Fe-18Cr-10Mn steels with a fixed amount of C + N (0.6 wt pct) was investigated by means of neutron diffraction and transmission electron microscopy (TEM). The SFE were evaluated by the Rietveld whole-profile fitting combined with the double-Voigt size-strain analysis for neutron diffraction profiles using neutron diffraction. The measured SFE showed distinguishable difference and were well correlated with the change in deformation microstructure. Three-dimensional linear regression analyses yielded the relation reflecting the contribution of both C + N and C/N: SFE (mJ/m2) = –5.97 + 39.94(wt pct C + N) + 3.81(C/N). As C fraction increased, the strain-induced γ→ε martensitic transformation was suppressed, and deformation twinning became the primary mode of plastic deformation.
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页码：4455 / 4459
页数：4
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