增材制造与铸造钛铝合金的微观组织及高温氧化行为对比研究

祝丁丁, 赵希雅, 张晓美, 梅子期, 逯文君, 王帅

Comparative Characterization of Microstructure and High-temperature Oxidation Behavior of Additive Manufacturing and Casting TiAl Alloy

ZHU Dingding, ZHAO Xiya, ZHANG Xiaomei, MEI Ziqi, LU Wenjun, WANG Shuai

图5 铸造和增材制造的TNM合金在900 ℃大气中氧化后横截面SEM以及TEM图

Fig.5 Cross-sectional SEM and TEM micrographs of cast and AM TNM alloys after oxidation in air at 900 oC (scale bars consistent; red dashed lines denote the oxide/substrate interface): (a-d) cast TNM oxidized for 1, 8, 24 and 48 h, (e-h) AM TNM oxidized for 1, 8, 24 and 48 h, (i) HAADF-STEM image of the oxide layer formed on the cast TNM alloy after 1 h of oxidation, (j-l) corresponding EDS Ti, Al and O elemental maps of the region depicted in Fig.5i