Ni-Al合金における形状記憶効果に関する分子動力学的考察(OS6d 相変態解析の新展開)

抄録

Molecular dynamics analysis is executed in order to investigate the atomistic mechanism of the shape memory effect. As an interatomic potential, the embedded-atom-method potential for NJ-Al alloy is applied. A series of thermo-mechanical loading is applied to the MD. Model, and the shape memory effect, consisting of deformation by shear loding, only elastic recovery by unloading, the inverse transformation from martensite to bcc by heating, and martensitic transformation. By cooling, is successfully observed. The dependency of the model size and the initial configuration on the result is also discussed so as to explain the difference of the atomistic stress-strain curve and the macroscopic one.