| 2 | Evolution of microstructure and phase composition of Ti-3Al-5Mo-4.5V alloy with varied β phase stability显示文摘The microstructure evolution and phase composition of an α+β titanium alloy, Ti-3Al-5Mo-4.5V(wt.%),have been investigated. Electron probe micro analysis(EPMA) quantitative results manifest that the stability of β phase decreases with increasing quenching temperature, which is influenced by the significant variation of β-stabilizing elements concentration. Detailed microstructure analysis shows that the β→ωphase transformation does occur when quenching at 750℃ and 800 ℃. The ω-reflections change from incommensurate ω-spots(750 ℃) to ideal ω-spots(800 ℃) as the β stability of the alloy decreases. Further the decrease of β phase stability encourages the formation of athermal α ' martensite, which has the following orientation relationships: [111]β//[110]α',[100]p//[100]α ' and [-110]p//[00-1]α' with respect to the β matrix. | Q.Xue Y.J.Ma J.F.Lei R.Yang C.Wang | 2018 | Journal of Materials Science & Technology2018，34，12： | 8 |
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