Relief of tensile residual stress in girth joint of AISI 316 steel by deep cryogenic treatment
Although it has been reported that deep cryogenic treatment can improve the wear and fatigue resistance, of some metals and alloys. less work was done to investigate the effect of such processing has on weld joint of austenitic stainless steels. In this study, phase transformation of 316 austenitic stainless steels was studied by the magnetic measurement before and after deep cryogenic treatment, and residual stress in fusion zone and heat-affected zone of girth joint of AISI 316 stainless steel was measured by the electric discharge cutting and static state strain gauge after deep cryogenic treatment. The results indicated that the deep cryogenic treatment can greatly alleviate tensile residual stress of girth joint of austenitic stainless steels greatly. Some plastic deformation resulted from thermal stress under rapid cooling-down and warming-uo during the deep cryogenic treatment process is responsible for the relaxation of welding residual stress. Moreover, welding residual stress can be further relaxed if martensite transformation occurs.
Girth joint Austenitic stainless steel Deep cryogenic treatment Residual stress
Qiongqi Wang Weize Wang Fu-Zhen Xuan Zhengdong Wang Shan-Tung Tu
School of Mechanical and Power Engineering, East China University of science and technology, Shanghai 200237, China
国际会议
国际断裂力学2007年会(Fracture Mechanics and Applications 2007)
长沙
英文
383-387
2007-11-01（万方平台首次上网日期，不代表论文的发表时间）