Modelling the behaviour of polycrystalline austenitic steel with twinning-induced plasticity effect

被引：119
|
作者：
Shiekhelsouk, M. N. [1 ]
Favier, V. [1 ]
Inal, K. [2 ]
Cherkaoui, M. [3 ]
机构：
[1] ENSAM, LPMM, UMR CNRS 7554, F-57078 Metz, France
[2] ENSMSE CMP PS2, F-13120 Gardanne, France
[3] Georgia Inst Technol, GeorgiaTech CNRS UMI 2958, Atlanta, GA 30332 USA
来源：
INTERNATIONAL JOURNAL OF PLASTICITY | 2009年 / 25卷 / 01期
关键词：
Dislocations; Twinning; Elastic-viscoplastic material; Crystal plasticity; Homogenisation; STACKING-FAULT-ENERGY; ELASTIC-VISCOPLASTIC BEHAVIOR; RATE-DEPENDENT POLYCRYSTALS; SELF-CONSISTENT APPROACH; HETEROGENEOUS MATERIALS; TEXTURE DEVELOPMENT; CRYSTAL PLASTICITY; SINGLE-CRYSTALS; CONSTITUTIVE-EQUATIONS; MECHANICAL-PROPERTIES;
D O I：
10.1016/j.ijplas.2007.11.004
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
A micromechanical model using the scale transition method in elastoviscoplasticity has been developed to describe the behaviour of those austenitic steels that display a TWIP effect. A physically based constitutive equation at the grain scale is proposed considering two inelastic strain modes: crystallographic slip and twinning. The typical organizations of microtwins observed in electron microscopy are considered, and the twin-slip as well as the twin-twin interactions are accounted for. The parameters for slip are first fitted on the uniaxial tensile response obtained at intermediate temperatures (when twinning is inhibited). Then, the parameters associated with twinning are identified using the stress-strain curve at room temperature. The simulated results in both macro and micro scales are in good agreement with experimentally obtained results. (C) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码：105 / 133
页数：29
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