Directional solidification of Ti-45Al-8Nb-（W,B,Y） alloy
来源期刊：Rare Metals2010年第3期
论文作者：DING Xianfei,LIN Junpin,HE Jianping,YE Feng,and CHEN Guoliang State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Beijing ,China
文章页码：292 - 297
摘 要：Using a Bridgman vertical vacuum furnace,Ti-45Al-8Nb-（W,B,Y） （at.%） bars,which were prepared from a plasma arc melting （PAM） ingot,were directionally solidified at growth rates of 10,15,and 20 μm/s.Polysynthetic twinned （PST） crystal with an aligned lamellar microstructure was obtained at the growth rate of 15 μm/s because of high Nb addition.The principle of PST crystal growth and the effect of Nb element were discussed.The results of investigations on microstructure and micromechanical properties of the directionally solidified （DS） bars of Ti-45Al-8Nb-（W,B,Y） alloy are briefly summarized.
DING Xianfei,LIN Junpin,HE Jianping,YE Feng,and CHEN Guoliang State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Beijing 100083,China
摘 要：Using a Bridgman vertical vacuum furnace,Ti-45Al-8Nb-（W,B,Y） （at.%） bars,which were prepared from a plasma arc melting （PAM） ingot,were directionally solidified at growth rates of 10,15,and 20 μm/s.Polysynthetic twinned （PST） crystal with an aligned lamellar microstructure was obtained at the growth rate of 15 μm/s because of high Nb addition.The principle of PST crystal growth and the effect of Nb element were discussed.The results of investigations on microstructure and micromechanical properties of the directionally solidified （DS） bars of Ti-45Al-8Nb-（W,B,Y） alloy are briefly summarized.
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