文献类型：会议论文

英文题名：EFFECTS OF RESIDUAL STRESSES ON THE HIGH CYCLE FATIGUE BEHAVIOR OF Ti-6Al-4V

作者：Li, Yu-Jia[1];Xuan, Fu-Zhen[1];Wang, Zheng-Dong[1];Tu, Shan-Tung[1]

机构：[1]E China Univ Sci & Technol, Minist Educ, Key Lab Safety Sci Pressurized Syst, Shanghai 200237, Peoples R China

会议论文集：ASME Pressure Vessels and Piping Division/K-PVP Conference

会议日期：JUL 18-22, 2010

会议地点：Bellevue, WA

语种：英文

摘要：Axial force-controlled fatigue tests are conducted at various stress ratios (R) on Ti-6Al-4V specimens prepared by two different manufacturing techniques (hard turning plus polishing with and without vacuum stress relieve anneal carried out after polishing). Residual stress is measured by using X-ray diffraction. Results indicate that the surface compressive residual stress lead to an increase of fatigue limit at a given life and stress ratio. This effect decreases with increasing stress ratio R. At R=0.6, the effect of surface residual stress on fatigue limit fades away. In addition, the location of crack initiation shifts from surface to interior when the stress ratio changes from -1 to 0.6.