Pressure-induced α → ω transition in titanium metal: a systematic study of the effects of uniaxial stress

By D. Errandonea, Y. Meng, M. Somayazulu, D. D. F. Aplicada-ICMUV, U. Valencia, Hpcat, Carnegie Institution of Washington. 2004

369 citations recorded by the source corpus.

Abstract The effects of uniaxial stress on the pressure-induced α → ω transition in pure titanium (Ti) are investigated by means of angle dispersive X-ray diffraction in a diamond-anvil cell. Experiments under four different pressure environments reveal that: (1) the onset of the transition depends on the pressure medium used, going from 4.9 GPa (no pressure medium) to 10.5 GPa (argon pressure medium); (2) the α and ω phases coexist over a rather large pressure range, which depends on the pressure medium employed; (3) the hysteresis and quenchability of the ω phase is affected by differences in the sample pressure environment; and (4) a short-term laser heating of Ti lowers the α → ω transition pressure. Possible transition mechanisms are discussed in the light of the present results, which clearly demonstrate the influence of uniaxial stress in the α → ω transition.

Subfields: Geophysics, Materials Chemistry, Mechanics of Materials

View Paper: https://www.semanticscholar.org/paper/c2787c966639d2434e0660381d650cf708a3bdec