Constitutive Modeling of the Tensile Behavior of Al-TWIP Steel

被引：55
|
作者：
Kim, Jinkyung [1 ]
Estrin, Yuri [2 ,3 ]
Beladi, Hossein [4 ]
Timokhina, Ilana [4 ]
Chin, Kwang-Geun [5 ]
Kim, Sung-Kyu [5 ]
De Cooman, Bruno C. [1 ]
机构：
[1] Pohang Univ Sci & Technol, Grad Inst Ferrous Technol, Mat Design Lab, Pohang 790784, South Korea
[2] Monash Univ, Dept Mat Engn, Ctr Adv Hybrid Mat, Clayton, Vic 3800, Australia
[3] CSIRO, Div Proc Sci & Engn, Clayton, Vic 3168, Australia
[4] Deakin Univ, Ctr Mat & Fibre Innovat, Geelong, Vic 3216, Australia
[5] POSCO Gwangyang Works, Tech Res Labs, Gwangyang 545090, Jeonnam, South Korea
来源：
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2012年 / 43A卷 / 02期
基金：
澳大利亚研究理事会; 新加坡国家研究基金会;
关键词：
TRIP/TWIP STEELS; DEFORMATION; STRENGTH; BOUNDARIES; EVOLUTION;
D O I：
10.1007/s11661-011-0898-2
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
High Mn steels demonstrate an exceptional combination of high strength and large ductility as a result of their high strain-hardening rate during deformation. The microstructure evolution and strain-hardening behavior of Fe18Mn0.6C1.5Al TWIP steel in uniaxial tension were examined. The purpose of this study was to determine the contribution of all the relevant deformation mechanisms-slip, twinning, and dynamic strain aging. Constitutive modeling was carried out based on the Kubin-Estrin model, in which the densities of mobile and forest dislocations are coupled to account for the interaction between the two dislocation populations during straining. These coupled dislocation densities were used to simulate the contribution of dynamic strain aging to the flow stress. The model was modified to include the effect of twinning. To ascertain the validity of the model, the microstructural evolution was characterized in detail by means of transmission electron microscopy and electron back-scatter diffraction.
引用
收藏
页码：479 / 490
页数：12
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