EFFECT OF HOMOGENIZATION PROCESSING ON MICROSTRUCTURE AND PROPERTIES OF Ti-34Al-2Mn ALLOY

查看全文 作　　者：Lei,Changming Qu,Xuanhui Huang,Baiyun Xiong,Xiang Powder Metallurgy Research Institute,Central South University of Technology,Changsha 410083,China 出　　处：《中国有色金属学会会刊:英文版》索引1993年第3卷第4期,共6页 基　　金：Supported by National Advanced Materials Committee of China 摘　　要：A γ-TiAl base alloy with the composition of Ti-34Al-2Mn(wt--%)was prepared by consum-able electrode arc-melting technique.The effect of homogenization processing following arc-melt-ing on its microstructure and mechanical properties was investigated.The emphases were placedon the microstructural evolution during solidification and homogenization,and the relationship be-tween microstructure and ductility.It has been determined that the samples annealed at 900℃for 20 h exhibit the best ductility compared with those treated at other temperatures up to 1100℃,and they have a mixed structure of equiaxed grain of γ-TiAl single phase and some prima-ry lamellar grains which include three types of interfaces,i.e.,α₂/γ,/γ/γ_S,γ/γ_T,maintainingspecific orientaion relationships between both sides.The ductility improvement is believed to be as-sociated with existence of suitable amount of α₂-Ti₃Al phase and the refinement of grains ob-tained at 900℃. 关 键 词：Ti-34Al-2Mn ALLOY HOMOGENIZATION MICROSTRUCTURE PROPERTIES