材料科学
压力(语言学)
钛
复合材料
冶金
语言学
哲学
作者
Daniel Errandonea,Yue Meng,Maddury Somayazulu,Daniel M. Häusermann
标识
DOI:10.1016/j.physb.2004.10.030
摘要
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.
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