Evolution of microstructure and phase composition of Ti-3Al-5Mo-4.5V alloy with varied β phase stability
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2018年第12期
论文作者：Q.Xue Y.J.Ma J.F.Lei R.Yang C.Wang
文章页码：2325 - 2330
摘 要：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.Xue1,2，Y.J.Ma2，J.F.Lei2，R.Yang2，C.Wang1
1. School of Metallurgy,Northeastern University2. Institute of Metal Research,Chinese Academy of Sciences
摘 要：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.
关键词：
