Ti_3Al-Nb合金的有序转变  

ON THE ORDERING TRANSFORMATIONS IN Ti_3 Al-Nb ALLOY

作　　者：李东[1] 周敬[1] 常昕[1] 关少轩[1] 

机构地区：[1]中国科学院金属研究所

出　　处：《金属学报》1990年第6期A443-A448,共6页Acta Metallurgica Sinica

摘　　要：研究了Ti_3Al-Nb合金在高温下的有序化,冷却过程高温β相转变及时效过程亚稳定β相分解的行为,结果指出,在1060℃固溶处理时,合金形成初生α_2和β高温有序相;在固溶处理后的冷却过程中,合金发生β→α_2+ω型转变;在700℃时效过程中,合金发生(β+ω型)亚稳→(α_2+β)稳定分解。Study was made of the behaviour of ordering transformation in Ti_3Al- Nb alloy, including the ordering at high temperature, the transformation of high temperature β phase during cooling, and the decomposition of metastable β phase during aging. Results show that the ordered primary a_2 and high temperature β in alloy occurred at 1060℃. The transformation of high temperature β phase proceed by β→a_2+ω type during cooling, and the decomposition of metastable β and ω type proceeded by (β+ω type)_(metastable)→(a_2+β)_(stable) during aging at 700℃.

关 键 词：TI3AL-NB合金 有序 转变 相变 

分 类 号：TG146.23[一般工业技术—材料科学与工程]