Advances in phase relationship for high Nb-containing TiAl alloys

被引：1
|
作者：
Yong-Feng Liang [1 ]
Xiang-Jun Xu [2 ]
Jun-Pin Lin [1 ]
机构：
[1] State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing
[2] Materials and Chemistry School,Zhongyuan University of Technology
来源：
RareMetals | 2016年 / 35卷 / 01期
基金：
中国国家自然科学基金;
关键词：
TiAl alloy; Nb addition; Phase diagram; Microsegregation; Microstructure;
D O I：
暂无
中图分类号：
TG146.23 [];
学科分类号：
080502 ;
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 temperatures.Specifically,the service temperature of the high Nb-TiAl alloys is 60-100℃higher than that of conventional TiAl alloys.Recently 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 properties.This work presents an in-depth review of the high Nb-TiAl alloys regarding the advances in phase diagram,formation mechanism of the new γ1phase,microsegregation induced by adding a high content of alloying element Nb,and the mechanism of the B2/ω phase formation.Some challenges in developing the high Nb-TiAl alloys are also discussed.
引用
收藏
页码：15 / 25
页数：11
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