基于Weibull分布的铝/镁异种金属电磁脉冲焊接接头疲劳寿命研究

doi:10.3901/JME.260171

机械工程学报 ›› 2026, Vol. 62 ›› Issue (10): 201-209.doi: 10.3901/JME.260171

• 材料科学与工程 • 上一篇

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基于Weibull分布的铝/镁异种金属电磁脉冲焊接接头疲劳寿命研究

朱聪聪¹, 崔俊佳², 李光耀², 高文理³

1. 中国矿业大学机电工程学院徐州 221116;
2. 湖南大学整车先进设计制造技术全国重点实验室长沙 410082;
3. 湖南大学材料科学与工程学院长沙 410082

收稿日期:2025-05-19 修回日期:2025-12-06 发布日期:2026-07-29
作者简介:朱聪聪,女,1994年出生,博士,讲师。主要研究方向为异种金属的电磁脉冲焊接、汽车航空航天用高强铝合金的开发制备及应用。E-mail:zhu_congcong@cumt.edu.cn;崔俊佳(通信作者),男,1983年出生,博士,教授,博士研究生导师。主要研究方向为航空航天先进制造装备开发、新能源汽车高强轻质结构设计开发、异种材料高效连接技术和动力电池智能制造技术。E-mail:cuijunjia@hnu.edu.cn
基金资助:
中央高校基本科研业务费资助项目(2024QN11016)。

Research on Fatigue Life of Al/Mg Dissimilar Metals Electromagnetic Pulse Welding Joints Based on Weibull Distribution

ZHU Congcong¹, CUI Junjia², LI Guangyao², GAO Wenli³

1. School of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou 221116;
2. State Key Laboratory of Advanced Design and Manufacturing Technology for Vehicle, Hunan University, Changsha 410082;
3. School of Materials Science and Engineering, Hunan University, Changsha 410082

Received:2025-05-19 Revised:2025-12-06 Published:2026-07-29

摘要/Abstract

摘要： 采用电磁脉冲焊接技术成功获得1.0 mm厚5052铝合金管材和1.5 mm厚AZ31镁合金管材的搭接接头，优化工艺参数可使铝/镁接头的强度高于铝合金母材。通过疲劳性能测试和断口表征研究了铝/镁接头的疲劳寿命和疲劳失效特点，结果表明：铝/镁接头焊缝的长度随着放电能量的增大呈先增大后减小的趋势，放电能量为35 kJ时接头抗剪切性能最好；铝/镁接头对疲劳加载较为敏感，接头的疲劳寿命随着应力水平的增大逐渐降低；低应力水平下接头的疲劳失效位置为Mg管受冲击处，高应力水平下接头的疲劳失效位置为焊缝处；基于双参数Weibull分布对接头的疲劳寿命进行统计分析，绘出不同可靠度(10%、36.8%、50%和90%)下的S-N曲线，为铝/镁电磁脉冲焊接接头在汽车等工业领域中的应用提供理论依据和试验参考。

关键词: 电磁脉冲焊接, 铝/镁异种金属, Weibull分布, 疲劳寿命, 疲劳失效行为

Abstract: The lap joints of 1.0 mm thick 5052 aluminum alloy tube and 1.5 mm thick AZ31 magnesium alloy tube were successfully obtained by electromagnetic pulse welding technology. The strength of Al/Mg joints is higher than that of Al alloy base metal by optimizing the process parameters. The fatigue life and fatigue failure characteristics of Al/Mg joints are studied by fatigue performance testing and fracture characterization. The results show that the weld length of Al/Mg joints increased first and then decreased with the increase of discharge energy, and the mechanical properties of Al/Mg joints are the best when the discharge energy is 35 kJ. The Al/Mg joints are more sensitive to fatigue loading, and the fatigue life of Al/Mg joints gradually decreased with the increase of stress. The fatigue failure location of the joints at low stress levels is the impact zone of Mg tube, while the fatigue failure location of the joints at high stress levels is the weld seam. The fatigue life of the joints is statistically analyzed based on dual parameter Weibull distribution, and S-N curves are plotted under different confidence levels (10%, 36.8%, 50% and 90%), which provides certain theoretical basis and teat reference for the application of Al/Mg electromagnetic pulse welding joints in automotive and other industrial fields.

Key words: electromagnetic pulse welding, Al/Mg dissimilar metals, Weibull distribution, fatigue life, fatigue failure behavior

中图分类号:

TG156

朱聪聪, 崔俊佳, 李光耀, 高文理. 基于Weibull分布的铝/镁异种金属电磁脉冲焊接接头疲劳寿命研究[J]. 机械工程学报, 2026, 62(10): 201-209.

ZHU Congcong, CUI Junjia, LI Guangyao, GAO Wenli. Research on Fatigue Life of Al/Mg Dissimilar Metals Electromagnetic Pulse Welding Joints Based on Weibull Distribution[J]. Journal of Mechanical Engineering, 2026, 62(10): 201-209.

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链接本文: http://www.cjmenet.com.cn/CN/10.3901/JME.260171

http://www.cjmenet.com.cn/CN/Y2026/V62/I10/201

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基于Weibull分布的铝/镁异种金属电磁脉冲焊接接头疲劳寿命研究

Research on Fatigue Life of Al/Mg Dissimilar Metals Electromagnetic Pulse Welding Joints Based on Weibull Distribution

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