The Mitigation of Weld Residual Stress on 304L Stainless Steel by Post Weld Cool Treatment Process
The high welding residual stress is the main factors affecting the service life of welded structures.Post weld cool treatment (PWCT) is a novel method by introducing reverse process welding temperature field to eliminate the residual stress and to obtain compressive stress layer.The major factors affecting the effects of post weld cool treatment (PWCT) is preheating temperature,cooling time and cooling range.In this paper,a model to calculate the residual stress was built using finite element code ABAQUS,and different PWCT processes were applied on 304L stainless steel specimens.At the same time,impact indentation method (IIM) was used to measure the residual stress on the specimens.The results show that the longitudinal stress and the transverse stress were reduced obviously and compressive stress was generated after PWCT in both of the simulation and the experiment.The proposal preheating temperature was 400℃ and the cooling range was 2 times of weld width.Besides,the cooling time had little effect on the residual stress.
residual stress post weld cool treatment compressive stress 304L stainless steel impact indentation method
Wengting Jia Jianping Zhao Jun Cao
School of Mechanical and Power Engineering,Nanjing Tech University,Nanjing,Jiangsu,211816,China
国际会议
2016 International Symposium on Structural Integrity，ISSI—2016(2016国际结构完整性研讨会)
天津
英文
209-215
2016-05-26（万方平台首次上网日期，不代表论文的发表时间）