Effect of stress ratio on fatigue crack growth of Ti40 alloy

作     者：吴欢 赵永庆 曾卫东 

作者机构：Titanium Research CenterNorthwest Institute for Non-ferrous Metal Research School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi'an 710072China School of Materials Science and EngineeringNorthwestern Polytechnical University 

出 版 物：《中国有色金属学会会刊：英文版》 (Transactions of Nonferrous Metals Society of China)

年 卷 期：2007年第17卷第A01期

页      面：209-212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：Project(2007CB613805) supported by the National Basic Research Program of China 

主　　题：钛合金 压力 疲劳裂缝 应力实验 

摘      要：The effect of stress ratio on fatigue crack growth(FCG) behavior of Ti40 alloy was analyzed. A unified approach,developed by VASUDEVAN and SADANANDA was used. The approach is based on the realization that fatigue requires two load parameters for unambiguous description. They are two fracture mechanics parameters:the maximum stress intensity factor Kmax and the stress intensity amplitude △K. The results show that there are two mechanisms controlling the FCG behavior of Ti40 alloy. The curves of the two mechanisms in trajectory map are similar. They deviate to Kmax axial more strongly compared with other titanium alloy,which indicates that Ti40 alloy is more sensitive to environment.