A Coupled Finite Element and Crystal Plasticity Study of Friction Effect on Texture Evolution in Uniaxial Compression of NiTi Shape Memory Alloy

Materials

Li Hu¹  Tao Zhou¹  Shuyong Jiang²  Qiang Chen³ 

[1] College of Material Science and Engineering, Chongqing University of Technology, Chongqing 400054, China;College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin 150001, China;Southwest Technology and Engineering Research Institute, Chongqing 400039, China;

关键词: NiTi shape memory alloy;    texture evolution;    deformation mechanism;    finite element method;    crystal plasticity;   

DOI  :  10.3390/ma11112162

来源: DOAJ

【 摘 要 】

A coupled macro-meso-scale numerical simulation is applied to investigate the friction effect on texture evolution during uniaxial compression of NiTi shape memory alloy at 400 °C. In this approach, macroscale finite element simulations in consideration of various friction coefficient are conducted and then the corresponding velocity gradients in various regions are extracted mainly based on the delivery deformation gradient in the user-defined material subroutine (UMAT) in ABAQUS code. These velocity gradients are regarded as the deformation conditions applied in the mesoscale VPSC model. Simulation results in terms of macroscale finite element modeling demonstrate that only within the region of minimum deformation zone which is close to the die, friction effect has a nonnegligible influence on the velocity gradient. Simulation results with respect to the mesoscale VPSC modeling show that the affine and Neff = 10 linearization schemes provide the best predictions for NiTi shape memory alloy with cubic structure. Furthermore, the friction effect does have an influence on the evolution of slip mode activities in various deformation zones and therefore results in the inhomogeneous texture evolution within the deformed sample during uniaxial compression.

【 授权许可】

Unknown