Effect of hydrostatic pressure on thermally induced phase transformation in NiTi alloy: A molecular dynamics study
作者: Jia-Lu WanZhi-Bin ChenSheng-Jian QinJia-Xiang Shang
作者单位: 1School of Materials Science and Engineering, Beihang University, Beijing 100191, China
刊名: Computational Materials Science, 2018, Vol.153 , pp.119-125
来源数据库: Elsevier Journal
DOI: 10.1016/j.commatsci.2018.06.035
关键词: NiTi alloyHydrostatic pressurePhase transformation pathMolecular dynamics
英文摘要: Abstract(#br)Molecular dynamics simulations are performed to study the influence of hydrostatic pressure P on the thermally induced phase transformations in NiTi alloy during thermal cycling between 500 K and 5 K. It is found that the martensitic transformation path shows strong dependence on the P : During cooling process, the NiTi alloy undergoes single transformation of B2 → B19′ at 0 ≤ P ≤ 3 GPa, two-step transformation of B2 → B2 + R → B19′ at 3 < P ≤ 5 GPa, and B2 → R at 5 < P ≤ 8 GPa. The martensite start temperature ( M s ) decreases from 293 to 236 K with increasing P from 0 to 5 GPa, and the start temperature of R phase ( R s ) decreases from 333 to 233 K with increasing P from 6 to 8 GPa. The shift of M s or R s can be explained by the Clausius-Clapeyron equation. Our work...
全文获取路径: Elsevier  (合作)
影响因子:1.878 (2012)

  • transformation 变换
  • dynamics 动力学
  • alloy 合金
  • hydrostatic 铃静力的
  • induced 感应的
  • pressure 压力
  • molecular 分子的
  • study 学习
  • thermally 热地
  • phase 相位