超声冲击对高强铝合金搅拌摩擦焊接接头疲劳机制影响的研究进展  

Research progress of ultrasonic impact on fatigue mechanism of friction stir welding joint of high strength aluminum alloys

作　　者：李辉 付磊 林莉 黄新杰 罗云蓉 李秀兰 范琪 谌理飞 LI Hui;FU Lei;LIN Li;HUANG Xin-jie;LUO Yun-rong;LI Xiu-lan;FAN Qi;CHEN Li-fei(College of Mechanical Engineering,Sichuan University of Science and Engineering,Zigong 643000,China;School of Aeronautics and Astronautics,Sichuan University,Chengdu 610065,China;School of Materials Science and Engineering,Sichuan University of Science and Engineering,Zigong 643000,China)

机构地区：[1]四川轻化工大学机械工程学院,四川自贡643000 [2]四川大学空天科学与工程学院,四川成都610065 [3]四川轻化工大学材料科学与工程学院,四川自贡643000

出　　处：《轻合金加工技术》2020年第1期7-14,31,共9页Light Alloy Fabrication Technology

基　　金：国家自然科学基金项目(51701133、51301115);材料腐蚀与防护四川省重点实验室项目(2012CL10、2016CL17);过程装备与控制四川省高等学校重点实验室项目(GK201501、GK201808、GK201816);桥梁无损检测与工程计算四川省高校重点实验室项目(2018QYJ03、2018QZY01);四川省粉末冶金工程技术研究中心开放基金课题项目资助(SC-FMYJ2019-7)。

摘　　要：疲劳破坏常源于材料表面及次表面,同时也是材料最主要的失效方式,搅拌摩擦焊接结构也不例外。因此,提升焊接接头表面性能对于提高焊接接头疲劳寿命显得尤为重要。超声冲击处理技术作为一种新型表面后处理技术,对焊接接头疲劳性能的影响机制受到广泛关注与研究。作者对超声冲击改善搅拌摩擦焊焊接接头应力集中、残余应力、微观组织、不同超声冲击参数对接头疲劳性能的影响以及数值模拟技术与应力-寿命曲线在整个研究过程中的应用等方面进行综述,并展望超声冲击处理技术未来的研究方向。Fatigue damage often originates from the surface and subsurface of the material,and is also the main failure mode of the material. So do the friction stir welding structure.Therefore,improving the surface properties of the welded joint is particularly important for improving the fatigue life of welded joints. As a new type of surface post-treatment technology,the effects of ultrasonic impact treatment technology on the mechanism of the fatigue properties of joints has received extensive attention and research. In this paper,the effects of ultrasonic shock on improving stress concentration and residual stress of welded joints,improving the microstructure of materials,different ultrasonic impact parameters on the fatigue performance of friction stir welded joints,the application of numerical simulation technology and stress-life curves in the whole research process are reviewed. The future research direction of ultrasonic shock treatment technology is prospected.

关 键 词：超声冲击 搅拌摩擦焊 焊接接头 疲劳机制 

分 类 号：TG453.9[金属学及工艺—焊接]