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arXiv · 1310.1233

Density functional theory study of the α --> ω martensitic transformation in titanium induced by hydrostatic pressure

M. Jafari·M. Nobakhti·H. Jamnezhad·K. Bayati
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Abstract

The martensitic α --> ω transition was investigated in Ti under hydrostatic pressure. The calculations were carried out using the density functional theory (DFT) framework in combination with the Birch-Murnaghan equation of state. The calculated ground-state properties of α and ω phases of Ti, their bulk moduli and pressure derivatives are in agreement with the previous experimental data. The lattice constants of α and ω-phase at 0 K were modeled as a function of pressure from 0 to 74 GPa and 0 to 119 GPa, respectively. It is shown that the lattice constants vary in a nonlinear manner upon compression. The calculated lattice parameters were used to describe the α --> ω transition and show that the phase transition can be obtained at 0 GPa and 0 K.

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M. Jafari, M. Nobakhti, H. Jamnezhad, K. Bayati. 2013-09-25. Density functional theory study of the α --> ω martensitic transformation in titanium induced by hydrostatic pressure. https://doi.org/10.5488/cmp.16.33703

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