Effect of hydrostatic pressure on thermally induced phase transformation in NiTi alloy: A molecular dynamics study

[Display omitted] •Three transformation paths are observed in NiTi alloy under hydrostatic pressure.•Transformation temperatures (Ms, Rs) decrease with increasing pressure.•Different martensitic structures are observed. Molecular dynamics simulations are performed to study the influence of hydrostat...

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Bibliographic Details
Published in:Computational materials science 2018-10, Vol.153, p.119-125
Main Authors: Wan, Jia-Lu, Chen, Zhi-Bin, Qin, Sheng-Jian, Shang, Jia-Xiang
Format: Article
Language:English
Subjects:
Hydrostatic pressure
Molecular dynamics
NiTi alloy
Phase transformation path
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Summary:[Display omitted] •Three transformation paths are observed in NiTi alloy under hydrostatic pressure.•Transformation temperatures (Ms, Rs) decrease with increasing pressure.•Different martensitic structures are observed. 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 
ISSN:0927-0256
1879-0801
DOI:10.1016/j.commatsci.2018.06.035