Strain rate sensitivity of tensile properties in high Nb containing TiAl alloys

作     者：Jianfeng Gao Xiangjun Xu Junpin Lin Xiping Song Yanli Wang Guoliang Chen 

作者机构：State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing 100083 China 

出 版 物：《Journal of University of Science and Technology Beijing》 (北京科技大学学报（英文版）)

年 卷 期：2005年第12卷第6期

页      面：535-539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：This work was financially supported by the National Natural Science Foundation of China (No.50274005) and the State Key Projectfor Fundamental Research Developing Plan (No.G2000067206-2) 

主　　题：TiAl alloys strain rate tensile properties thermal activation 

摘      要：The effect of strain rate on the yield strength of high Nb containing TiAl alloy was studied. The results show that the strain rate sensitivity varies with the test temperature, and the yield strength is not sensitive to the strain rate at room temperature but significantly sensitive to the strain rate at high temperature. An increase of the strain rate or a decrease of the temperature results in an obvious change of fracture mode. It is found that the strain rate sensitivity of this alloy varying with temperature is due to the dislocation climb generated at high temperature.