文献类型：期刊文献

英文题名：Effect of Microstructure Evolution Induced by LP on Hydrogen Permeation Behavior of 316l Stainless Steel

作者：Huang, Shu[1]; Jiang, Yunfeng[1]; Sheng, Jie[1]; Agyenim-Boateng, Emmanuel[1,2]; Song, Yunjian[1]; Liu, Qiang[3]; Zhu, Mingliang[4]; Hu, Yongxiang[5]

机构：[1] School of Mechanical Engineering, Jiangsu University, Zhenjiang, 212013, China; [2] Department of Mechanical Engineering, Koforidua Technical University, KF-981, Koforidua, Ghana; [3] Key Laboratory of CNC Equipment Reliability, Ministry of Education, Jilin University, Changchun, 130015, China; [4] Key Laboratory of Pressure Systems and Safety, Ministry of Education, School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, 200237, China; [5] State Key Lab of Mechanical System and Vibration, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China

年份：2023

外文期刊名：SSRN

收录：EI(收录号：20230094508)

语种：英文

外文关键词：Grain refinement - Microstructure - Permeation - Residual stresses

摘要：In order to investigate the hydrogen permeation behavior of 316L stainless steel during the microstructural evolution induced by laser peening (LP), an electrochemical hydrogen charging system for initial hydrogen charging of LPed and non-LPed specimen was developed. Afterwards, the microhardness, residual stress and microstructures of the samples were determined and analyzed. Finally, electrochemical hydrogen permeation experiments were undertaken to verify LP's influence on hydrogen permeation parameters of 316L. The results showed that LP reduced the hydrogen-induced hardening rate of the alloy and additionally invoked high magnitude compressive residual stress (CRS) on its surface. At the layer close to the face of the specimen, grain refinement rate was as high as 56.18%, which was accompanied by the appearance of high-density dislocations. Compared with the non-LPed sample, the hydrogen permeation time increased significantly, and the saturation current density in steady state hydrogen permeation also decreased gradually. Additionally, the coefficient of hydrogen diffusion and hydrogen trap density of 316L stainless steel under LP were theoretically calculated on experimental basis, and the relationship between its microstructure and hydrogen permeation kinetics were as well studied. ? 2023, The Authors. All rights reserved.