镁-铝异种合金自冲铆接接头的力学性能  

Mechanical properties of self-piercing riveted joint for Mg-Al dissimilar alloys

作　　者：卢杰豪 赵伦 张俊凯 雷乐 李承旺 刘高宇 刘纪元 Md Shafiqul Islam Lu Jiehao;Zhao Lun;Zhang Junkai;Lei Le;Li Chengwang;Liu Gaoyu;Liu Jiyuan;Md Shafiqul Islam(Institute of Ultrasonic Technology,Shenzhen Polytechnic University,Shenzhen 518055,China;Faculty of Materials and Metallurgy,University of Science and Technology Liaoning,Anshan 114051,China;College of Electromechanical Engineering,Yunnan Open University,Kunming 650599,China;Department of Mechanical Engineering,Blekinge Tekniska Hogskola,Karlskrona 37179,Sweden)

机构地区：[1]深圳职业技术大学超声技术研究所,广东深圳518055 [2]辽宁科技大学材料与冶金学院,辽宁鞍山114051 [3]云南开放大学机电工程学院,云南昆明650599 [4]瑞典布京理工学院机械学院,瑞典卡尔斯克鲁纳37179

出　　处：《锻压技术》2024年第9期157-163,185,共8页Forging & Stamping Technology

基　　金：国家自然科学基金资助项目(12104324);高层次人才科研启动项目(6022310046k);深职大-新栋力超声波焊接技术研发中心(602331009PQ);深圳职业技术大学博士后出站后期资助项目(4103-6023271014K1);云南省教育厅科学研究基金资助项目(2022J0599)。

摘　　要：镁合金材料在车身轻量化制造方面具有巨大的潜力和应用空间,选取不同厚度的AZ31B镁合金和5083铝合金薄板材料进行自冲铆接,并通过拉伸实验和扫描电镜分析接头的静力学性能及微观组织。结果表明:自冲铆接能实现对AZ31B镁合金和5083铝合金薄板的有效连接;板厚搭配均匀的自冲铆接接头的整体力学性能最优;镁板厚度较小的自冲铆接接头的失效形式均为上板断裂,其余两组自冲铆接接头的失效形式均为下板拉脱;3组不同镁板厚度组合的自冲铆接接头断口均呈脆性断裂形貌。Magnesium alloy have great potential and application space in lightweight manufacturing of car body.Therefore,AZ31B magnesium alloy and 5083 aluminum alloy thin plates with different thicknesses for the self-piercing riveting were selected,and the static properties and microstructure of joints were analyzed by tensile test and scanning electron microscopy(SEM)test.The results show that the self-pierce riveting can achieve effective connection between AZ31B magnesium alloy and 5083 aluminum alloy thin plates.The overall mechanical properties of the self-piercing riveting joints with uniform plate thickness are optimal.The failure mode of the self-piercing riveting joints with smaller magnesium plate thickness is the fracture of upper plate,and the failure mode of the other two sets of the self-piercing riveting joints is the pulling off of lower plate.The fracture surface of the self-piercing riveting joints with three different magnesium plate thicknesses shows brittle fracture morphology.

关 键 词：车身轻量化 自冲铆接 镁合金 铝合金 力学性能 

分 类 号：TH131.1[机械工程—机械制造及自动化]