Effect of Ultrasonic Surface Rolling Process on High pH Stress Corrosion Cracking of X80 Welded Joint

摘要：

　　Ultrasonic surface rolling Process (USRP) was applied on X80 welded joint.Residual stress measurement, electrochemical polarization technique and slow strain rate testing were used to study the effect of USRP on stress corrosion cracking of X80 welded joint in high pH environment.The results show that residual compressive stresses is induced in surface layer of the welded joint.The free corrosion potential of welds is improved, while the corrosion current density decreases sharply.Meanwhile, the fracture time and strain increase significantly.The number and depth of cracks also decrease.The stress corrosion cracking susceptibility of X80 welded joint is reduced by USRP.

关键词： ultrasonic surface rolling processing welded joint high pH environment stress corrosion crack

作者: Yu Yin Bing-ying Wang Wen-long Zhang Wen-chun Jiang

作者单位: College of Mechanical and Electrical Engineering,China University of Petroleum,Qingdao,China College of Chemical Engineering,China University of Petroleum,Qingdao,China

会议类型: 国际会议

会议名称: 2014 International Symposium on Structural Integrity,ISSI2014(2014国际结构完整性学术会议)

会议地点: 兰州

会议语种:英文

页码: 449-455

在线出版日期: 2014-08-20（万方平台首次上网日期，不代表论文的发表时间）