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2. 定向凝固Ti-46Al-Nb合金显微组织、XRD谱及B2相分布特征

Fig.2. Microstructure (a), XRD spectrum (b) and the characteristics of B2 phase distribution (c, d) in directionally solidified Ti-46Al-Nb alloy (Inset in Fig.2c shows SAED pattern of B2 phase)