A micromechanical model for pretextured polycrystalline shape-memory alloys including elastic anisotropy

被引:0
作者
Klaus Hackl
Rainer Heinen
机构
[1] Ruhr-Universität Bochum,Lehrstuhl für Allgemeine Mechanik
[2] ThyssenKrupp Steel AG,Werkstoffkompetenzzentrum, Division Auto
来源
Continuum Mechanics and Thermodynamics | 2008年 / 19卷
关键词
Shape-memory alloys; Martensitic phase transformations; Relaxation; Martensite reorientation; Polycrystals; 46.15.Cc; 64.70.Kb; 81.30.Kf;
D O I
暂无
中图分类号
学科分类号
摘要
We present a micromechanical model for polycrystalline shape-memory alloys which is capable of reproducing important aspects of the material behavior such as pseudoelasticity, pseudoplasticity, tension–compression asymmetry and the influence of texture inhomogeneities which may occur from the production process of components or specimens. Our model is based on the optimization of the material’s free energy density and uses a dissipation ansatz which is homogeneous of first order. Considering the full anisotropic material properties of both the austenite and the martensite phase, we compute the evolution of the orientation distributions of austenite and martensite as internal variables of our model.
引用
收藏
页码:499 / 510
页数:11
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