朱聪聪,崔俊佳,李光耀,高文理

• 1:中国矿业大学机电工程学院
• 2:湖南大学整车先进设计制造技术全国重点实验室
• 3:湖南大学材料科学与工程学院

摘要(Abstract)：

采用电磁脉冲焊接(EMPW)技术对5052铝合金和AZ31镁合金管材进行了焊接，利用扫描电镜(SEM)、能谱分析(EDS)和万能试验机等研究了焊后热处理温度对铝/镁管材EMPW接头微观组织和力学性能的影响。结果表明：焊后热处理会使接头界面形成金属间化合物(IMCs),焊后热处理温度为200℃时，铝/镁界面处仅形成Al_(12)Mg_(17) IMC层，焊后热处理温度达到250和300℃时，界面处形成Al_(12)Mg_(17)和Al_3Mg_2 IMCs层，靠近Mg合金侧的为Al_(12)Mg_(17)层，靠近Al合金侧的为Al_3Mg_2层；IMCs的形成会严重影响接头的力学性能，随着焊后热处理温度的升高，焊接接头在拉伸-剪切测试中由铝管母材失效转变焊缝失效；焊后热处理温度≥150℃时，铝/镁EMPW接头均在焊缝处失效，但发生开裂的位置并不相同，可分为沿着靠近Al合金侧焊缝开裂的韧性断裂模式、沿Al_(12)Mg_(17)层开裂的脆性断裂模式和沿着Al_3Mg_2层开裂的脆性断裂模式3种。

关键词(KeyWords)： 铝/镁异种金属;电磁脉冲焊接;焊后热处理;微观组织;失效模式

Abstract:

Keywords:

基金项目(Foundation): 中央高校基本业务费(2024QN11016)

作者(Author): 朱聪聪,崔俊佳,李光耀,高文理

DOI: 10.13289/j.issn.1009-6264.2024-0548

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