Characterization of creep behavior of TiAl alloy with high Nb content at elevated temperatures

作     者：Cheng-Li Dong Hui-Chen Yu Ze-Hui Jiao 

作者机构：Beijing Key Laboratory of Aeronautical Materials Testing and EvaluationScience and Technology on Advanced High Temperature Structural Materials LaboratoryBeijing Institute of Aeronautical Materials Science and Technology on Advanced High Temperature Structural Materials LaboratoryBeijing Institute of Aeronautical Materials 

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：106-112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 Natural Science Foundation for Young Scholars of China(No.51401195) the National Basic Research Program of China(No.2011CB605506) 

主　　题：TiAl alloy Creep Rupture Life prediction Theta constitutive model 

摘      要：Creep experiments of the TiAl alloy with high Nb content were conducted to consider both the temperature dependence and stress dependence of its creep *** creep curves were characterized by Theta constitutive model,and Newton-Gauss method was applied to obtain the material *** on the rupture strain,the rupture life of the TiAl alloy was able to be predicted by Theta constitutive *** results show that the creep curves of the TiAl alloy contain primary creep,secondary creep and tertiary creep stages,especially for the lower *** rupture life of the TiAl alloy decreases with the increase in either applied stress or *** constitutive model is able to describe the creep deformation of the TiAl alloy accurately,and the predicted life agrees well with the experimental result.