Prediction of grain scale plasticity of NiTi shape memory alloy based on crystal plasticity finite element method

作     者：Li HU Shu-yong JIANG Lai-xin SHI Yan-qiu ZHANG 胡励;江树勇;时来鑫;张艳秋

作者机构：College of Material Science and EngineeringChongqing University of TechnologyChongqing 400054China College of Mechanical and Electrical EngineeringHarbin Engineering UniversityHarbin 150001China 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2019年第29卷第4期

页      面：775-784页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Projects(51475101 51305091 51305092)supported by the National Natural Science Foundation of China 

主　　题：grain scale plasticity NiTi shape memory alloy crystal plasticity finite element method plastic deformation microstructure evolution 

摘      要：Grain scale plasticity of NiTi shape memory alloy(SMA)during uniaxial compression deformation at 400℃was investigated through two-dimensional crystal plasticity finite element simulation and corresponding analysis based on the obtained orientation *** and strain distributions of the deformed NiTi SMA samples confirm that there exhibits a heterogeneous plastic deformation at grain *** stored dislocation(SSD)density and geometrically necessary dislocation(GND)density were further used in order to illuminate the microstructure evolution during uniaxial *** is responsible for sustaining plastic deformation and it increases along with the increase of plastic *** plays an important role in accommodating compatible deformation between individual grains and thus it is correlated with the misorientation between neighboring grains,namely,a high GND density corresponds to large misorientation between grains and a low GND density corresponds to small misorientation between grains.