Orientation relationship between α-phase and high-pressure ω-phase of pure group IV transition metals

The deformation texture of the high-pressure ω-phase of pure group IV metals was investigated using neutron diffraction analysis. The 〈0 0 0 1〉ω direction gradually aligned with the shear direction with an increase in the shear strain introduced by the high-pressure torsion process. The deformation texture suggested that the main slip system of the ω-phase was {11-20}〈0 0 0 1〉ω. We experimentally observed the orientation relationships of the mechanically stabilized ω-phase with respect to the reverse-transformed α-phase, and determined that the relationship was similar to that proposed by Silcock and Rabinkin.