Advances in phase relationship for high Nb-containing TiAl alloys

作     者：Yong-Feng Liang Xiang-Jun Xu Jun-Pin Lin 

作者机构：State Key Laboratory for Advanced Metals and MaterialsUniversity of Science and Technology Beijing Materials and Chemistry SchoolZhongyuan University of Technology 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2016年第35卷第1期

页      面：15-25页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：financially supported by the National Basic Research Program of China(No.2011CB605500) the National Natural Science Foundation of China(No.51271016) 

主　　题：TiAl alloy Nb addition Phase diagram Microsegregation Microstructure 

摘      要：γ-TiAl alloys,including two categories（the conventional TiAl and the high Nb-containing TiAl（high Nb-TiAl））,are technologically intriguing because of their applications at high ***,the service temperature of the high Nb-TiAl alloys is 60-100℃higher than that of conventional TiAl *** developed TiAl alloys,for example TNB,TNM,β-γ alloys,belong to the high Nb-TiAl alloys,displaying similar behavior in phase transformation,strengthening,oxidation at high temperatures,and relationships between composition,microstructure,and mechanical *** work presents an in-depth review of the high Nb-TiAl alloys regarding the advances in phase diagram,formation mechanism of the new γ_1 phase,microsegregation induced by adding a high content of alloying element Nb,and the mechanism of the B2/ω phase *** challenges in developing the high Nb-TiAl alloys are also discussed.