定向凝固高Nb含量TiAl合金微观组织演化与溶质偏析规律<sup>*</sup>

定向凝固高Nb含量TiAl合金微观组织演化与溶质偏析规律^*

李勇¹,刘国怀¹,王昭东¹,付天亮¹,李新中²,苏彦庆²,郭景杰²,傅恒志²

MICROSTRUCTURE EVOLUTION AND SOLUTE SEGREGATION IN DIRECTIONALLY SOLIDIFIED TiAl ALLOYS WITH HIGH Nb CONTENT

Yong LI¹,Guohuai LIU¹,Zhaodong WANG¹,Tianliang FU¹,Xinzhong LI²,Yanqing SU²,Jingjie GUO²,Hengzhi FU²

图6. 定向凝固Ti-46Al-Nb 合金相变过程和微观组织选择图

Fig.6. Selection diagram of the phase transition and the final microstructure with the evolution of the Nb content and the growth rate in directionally solidified Ti-46Al-Nb alloy