机械科学与技术2025，Vol.44Issue(7)：1179-1187,9.DOI:10.13433/j.cnki.1003-8728.20250042
超声冲击处理对316L不锈钢力学性能的影响
Effect of Ultrasonic Impact Treatment on Mechanical Properties of 316L Stainless Steel
摘要
Abstract
The effects of the ultrasonic impact treatment on the residual stress,impact toughness,and microhardness of 316L stainless steel was analyzed.By comparing the microstructure and fracture morphology of 316L stainless steel before and after UIT,the regularity of the mechanical properties by UIT is explored.The results indicate that after UIT,the surface residual tensile stress of 316L stainless steel is transformed into the residual compressive stress,with the average conversion rates of 204.97%in the x-axis direction and 198.74%in the y-axis direction,respectively.Additionally,the fibrous region increases,and the size and depth of the dimples become significantly larger,leading to the absorption of more energy in the Charpy impact fracture of 316L stainless steel,thus enhancing its impact toughness.UIT leads to severe plastic deformation on the surface of 316L stainless steel,thereby regulating the distribution of surface residual stress,refining the surface grains,and increasing the microhardness,thus comprehensively improving the impact toughness.关键词
超声冲击处理/残余应力/冲击韧性/断口形貌Key words
ultrasonic impact treatment/residual stress/impact toughness/fracture morphology分类
机械制造引用本文复制引用
许俊龙,刘超,徐冠华,陈洋..超声冲击处理对316L不锈钢力学性能的影响[J].机械科学与技术,2025,44(7):1179-1187,9.基金项目
国家重点研发计划(2020YFB1901502) （2020YFB1901502）
