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：

Rare Metals | 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

页码：15 / 25

页数：11