Transactions of Materials and Heat Treatment

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

Authors： Lu Jiehao1 2 Zhao Lun1 3 Zhang Junkai2 Lei Le1 Li Chengwang1 Liu Gaoyu1 Liu Jiyuan1 Md Shafiqul Islam4

Unit： (1.Institute of Ultrasonic Technology Shenzhen Polytechnic University Shenzhen 518055 China 2. Faculty of Materials and Metallurgy University of Science and Technology Liaoning Anshan 114051 China 3.College of Electromechanical Engineering Yunnan Open University Kunming 650599 China 4.Department of Mechanical Engineering Blekinge Tekniska Hgskola Karlskrona 37179 Sweden)

KeyWords： lightweight of car body self-piercing riveting magnesium alloy aluminum alloy mechanical properties

ClassificationCode：TH131.1

year,vol(issue):pagenumber：2024,49(9):157-163

Abstract：

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.

Funds：

基金项目: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）

作者简介：卢杰豪（1998-），男，硕士研究生 E-mail：13229438230@163.com 通信作者：赵伦（1988-），男，博士，副研究员 E-mail：zhaolun@szpt.edu.cn

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