Residual Stress Test and Finite Element Analysis of Titanium Alloy Surface Obtained by Electron Beam Welding

• Main Authors: LIU Xiaojia, LIN Jian, LEI Yongping, WU Zhongwei, LIU Xin, FU Pengfei
• Format: Article
• Language: zho
• Published: Journal of Aeronautical Materials 2016-08-01
• Series: Journal of Aeronautical Materials
• Subjects: Ti60 titanium alloy; electron beam welding; residual stress; finite element analysis
• Online Access: http://jam.biam.ac.cn/CN/10.11868/j.issn.1005-5053.2016.4.005
• ISSN: 1005-5053; 1005-5053

Ti60 titanium alloy plates were welded by electron beam,and the welding residual stress was tested and simulated by the residual stress tester and finite element analysis. The comparison of the residual stress values caused in the three kinds of welding processes of pre-heating, slow cooling and both pre-heating and slow cooling was carried out. The residual stress distribution law was also studied. Results show that in the vertical welding section, the longitudinal welding residual stress tested is similar to that simulated as to the change trend; in the parallel welding section, the distributions of the tested and simulated longitudinal welding residual stress are similar. These prove that the finite element analysis is reasonable and reliable. The process of pre-heating has little influence on the welding residual stress, but the slow cooling process can change its distribution.