直流电流对Ti-48Al-2Cr-2Nb合金组织和性能的影响

陈占兴,丁宏升,刘石球,陈瑞润,郭景杰,傅恒志

Effects of Direct Current on Microstructure and Properties of Ti-48Al-2Cr-2Nb Alloy

Zhanxing CHEN,Hongsheng DING,Shiqiu LIU,Ruirun CHEN,Jingjie GUO,Hengzhi FU

图1. 直流电流作用下定向凝固Ti-48Al-2Cr-2Nb合金的宏观组织

Fig.1. Macrostructures of directionally solidified Ti-48Al-2Cr-2Nb alloy without direct current (DC) (a) and with the DC densities of 32 mA/mm² (b), 64 mA/mm² (c) and 96 mA/mm² (d) (Zone A—original as-cast zone, zone B—heat affected zone, zone C—transition zone, zone D—columnar crystal zone, zone E—equiaxed crystal zone)