Effects of Multi-Pass Turning on Stress Corrosion Cracking of AISI 304 Austenitic Stainless Steel
Yansong Zhang,
Huan Xue,
Yongchun Li,
Xuelin Wang,
Xinli Jiang,
Chongwen Yang,
Kewei Fang,
Wenqian Zhang,
Hui Jiang
Affiliations
Yansong Zhang
Hubei Key Laboratory of Modern Manufacturing Quality Engineering, School of Mechanical Engineering, Hubei University of Technology, Wuhan 430068, China
Huan Xue
Hubei Key Laboratory of Modern Manufacturing Quality Engineering, School of Mechanical Engineering, Hubei University of Technology, Wuhan 430068, China
Yongchun Li
Hubei Key Laboratory of Modern Manufacturing Quality Engineering, School of Mechanical Engineering, Hubei University of Technology, Wuhan 430068, China
Xuelin Wang
School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430076, China
Xinli Jiang
School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430076, China
Chongwen Yang
School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430076, China
Kewei Fang
Suzhou Nuclear Power Research Institute, Suzhou 215004, China
Wenqian Zhang
Hubei Key Laboratory of Modern Manufacturing Quality Engineering, School of Mechanical Engineering, Hubei University of Technology, Wuhan 430068, China
Hui Jiang
School of Mathematics and Statistics, Huazhong University of Science and Technology, Wuhan 430076, China
Austenitic stainless steels are extensively used in mechanical engineering. The machined surface integrity has an essential influence on the stress corrosion cracking (SCC) performance of stainless steels. In this paper, the effects of multi-pass turning on the SCC susceptibility of AISI 304 austenitic stainless steel were investigated by correlating the SCC crack density to the machining-induced surface characteristics in terms of roughness, micro-hardness, and residual stress. In the multi-pass turning, the surface roughness and residual stress were the least after the double pass turning, and the surface micro-hardness was the maximum after the triple-pass turning. The SCC susceptibility was evaluated after SCC tests in boiling MgCl2 solution. The results showed that the weakest SCC sensitivity was observed in double-pass turning 304 stainless steel, while the most susceptible SCC was found in triple-pass turning. Compared with the double-pass turning, the increase in SCC sensitivity of triple-pass turning was attributed to the larger roughness, higher micro-hardness and greater residual tensile stresses.
