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3. 定向凝固Ti-46Al-Nb合金在不同生长速率和Nb含量下的宏观组织以及相应的微观组织

Fig.3. Longitudinal macrostructures and corresponding microstructures of directionally solidified Ti-46Al-Nb alloy with different Nb contents and growth rates

(a) macrostructure of Ti-46Al-8Nb alloy, V=2 μm/s

(b~d) microstructures of Ti-46Al-8Nb alloy, V=2 μm/s

(e) macrostructure of Ti-46Al-8Nb alloy, V=3 μm/s

(f~h) microstructures of Ti-46Al-8Nb alloy, V=3 μm/s

(i) macrostructure of Ti-46Al-10Nb alloy, V=30 μm/s

(j~l) microstructures of Ti-46Al-10Nb alloy, V=30 μm/s, inset in Fig.3l show the locally magnified image