Deformation Twinning Behavior of Twinning-induced Plasticity Steels with Different Carbon Concentrations - Part 2: Proposal of Dynamic-strain-aging-assisted Deformation Twinning

被引：35
|
作者：
Koyama, Motomichi [1 ,2 ]
Sawaguchi, Takahiro [1 ]
Tsuzaki, Kaneaki [1 ,2 ]
机构：
[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan
[2] Kyushu Univ, Dept Mech Engn, Nishi Ku, Fukuoka 8190395, Japan
来源：
ISIJ INTERNATIONAL | 2015年 / 55卷 / 08期
基金：
日本学术振兴会;
关键词：
deformation twinning; dynamic strain aging; austenitic steel; electron backscatter diffraction (EBSD); FE-MN-C; STACKING-FAULT ENERGY; EPSILON-MARTENSITIC TRANSFORMATION; DISLOCATION SEPARATION; INSTABILITY CONDITION; DEPENDENCE; MICROSTRUCTURE; STRESS; METALS; FLOW;
D O I：
10.2355/isijinternational.ISIJINT-2015-070
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
In a previous study, the carbon concentration dependence of the deformation twinning behavior in twinning-induced plasticity steels was investigated, which clarified that the deformation twin fraction in the < 144 > tensile orientation did not change with the carbon concentration. In this study, twinning deformation occurred in the Fe-18Mn-1.2C steel at 473 K with a relatively high stacking fault energy of 55 mJ/m(2). To explain these experimental results, dynamic strain aging of Shockley partials dislocations was proposed as an additional contributing factor to assist the deformation twinning in high-carbon-added austenitic steels. Most abnormalities concerning deformation twinning such as the high stacking fault energy in Fe-Mn-C austenitic steels were interpreted by considering the effect of dynamic strain aging.
引用
收藏
页码：1754 / 1761
页数：8
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