MOLECULAR DYNAMICS SIMULATIONS ON THE DEFORMATION MECHANISM OF MULTI-GRAIN SHAPE-MEMORY ALLOY

摘要：

Molecular dynamics simulations are carried out to investigate the deformation mechanism of a shape memory alloy using multi-grain models with an EAM potential for Ni-Al alloy.Applying a series of loading,unloading,heating and cooling conditions,the shape-memory behavior is successfully simulated,and the deformation mechanism is revealed to depend on the grain shape,crystal orientation of each grain,and their combination in a model.Compared to the previously demonstrated simulation for a single-crystal model,the stress-strain relation draws a smooth curve as usually obtained experimentally.Various models with different grain geometry and crystal orientations are applied,and a strong dependency on the deformation behavior is observed.

关键词： Molecular dynamics Shape-memory effect Computer simulation

作者: T.Uehara C.Asai N.Ohno

作者单位: Dept.Mechanical Systems Engineering,Yamagata University,4-3-16,Jonan,Yonezawa,Yamagata 992-8510,Japa Dept.Computational Sci.Eng.,Nagoya Univ.Nagoya 464-8603,Japan

会议类型: 国际会议

会议名称: 第二届国际非均质材料力学会议(The Second International Conference on Heterogeneous Material Mechanics)

会议地点: 安徽黄山

会议语种:英文

页码: 316-319

在线出版日期: 2008-06-03（万方平台首次上网日期，不代表论文的发表时间）