|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||GAT-2017 (Gamma Alloys Technology - 2017)
||F-55: Effect of Al Content on the Microstructure and Tensile Properties of Cast Ti-xAl-15Nb-1Mo Alloy
||Liangliang Liu, Dong Liu, Yuyou Cui, Rui Yang
|On-Site Speaker (Planned)
In this study, the microstructure and tensile properties at room temperature and 600 <SUP>o</SUP>C of four cast Ti-xAl-15Nb-1Mo alloys were evaluated with Al contents varying from 15 to 23.5 at.%. The microstructure of the alloys and the volume fraction of B2, α<SUB>2</SUB> and O phase were evaluated at the different Al level. As expected Ti-15Al-15Nb-1Mo contains no O phase but has the highest portion of the B2 phase, while Ti-23.5Al-15Nb-1Mo has the highest portion of the O phase but contains little B2 phase. No apparent effect of Al content on grain size was found. For Al content varying from 15 to 20.5 at.%, the strength decreases and ductility increases at both room temperature and 600 <SUP>o</SUP>C. When Al content increases from 20.5 to 23.5 at.%, the room temperature tensile strength and ductility do not change much, but the strength increases and ductility decreases at 600 <SUP>o</SUP>C.
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