Effect of Cold Working on the Residual Stress around the Notch front of Stress Corrosion Cracking

2018 2nd International Conference on Advanced Technologies in Design, Mechanical and Aeronautical Engineering

工业技术;机械制造;航空航天工程

Lingyan, Zhao^1 ; Yinghao, Cui^2 ; Fuqiang, Yang^1

School of Science, Xi'An University of Science and Technology, Xi'an

710054, China^1

School of Mechanical Engineering, Xi'An University of Science and Technology, Xi'an

710054, China^2

关键词: Compressive residual stress;    Compressive strain;    High-temperature water;    Residual compressive stress;    Residual stress and strains;    Stress-strain field;    Tensile residual stress;    Weld residual stress;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/408/1/012007/pdf
DOI  :  10.1088/1757-899X/408/1/012007

来源: IOP

【 摘 要 】

Failures show that the austenitic stainless steel (SS) pipes with produced high weld residual stresses are more susceptible to stress corrosion cracking in the simulated high temperature water environments of pressurized water reactor. To understand the effect of cold working on the residual stress and strain of stress corrosion cracking in 304SS, the stress-strain field near the crack front of 304SS under different degree of cold working was simulated by ABAQUS. Results show that the higher tensile residual stress and the larger compressive residual stress simultaneously occurs in the lower cold working material, and cold working has greater effect on the residual stress than on the residual strain. The residual compressive stress and residual compressive strain both decrease rapidly in a small range around the notch fronts and tend to be consistent in a more larger distance. But cold working has little effect on the residual strain.