亓安泰,吴鸿燕,刘泽民,程东海,成家龙,肖雄

• 1:南昌航空大学航空制造工程学院
• 2:九江职业技术学院船舶工程学院

摘要(Abstract)：

以TiFeCoCrNi高熵合金粉末为中间层，对镁/钛异种材料进行电阻点焊，采用扫描电镜、X射线衍射仪和电子万能试验机等研究了接头的组织结构、物相和力学性能，分析了接头的界面反应扩散行为。结果表明：接头依次由镁合金母材、α-Mg+Al_2FeCo、FCC+η、Ti_3Al+FCC+η和TC4母材组成。镁合金中的Al元素扩散进入高熵合金中间层生成Al_2FeCo,钛合金中的Ti、Al元素扩散进入高熵合金中间层生成Ti_3Al,且两界面区均由固溶体和化合物的混合组织组成，提高了接头性能。在焊接电流为18.8～24.5 kA、焊接压力为4.06～7.83 kN、焊接时间为6～24 cycles的工艺范围内，接头强度在2.4 kN以上；在焊接压力为5.13 kN、焊接电流为21.7 kA、焊接时间为20 cycles时，接头的拉剪载荷最大，为5.368 kN。

关键词(KeyWords)： 镁合金;钛合金;电阻点焊;TiFeCoCrNi中间层;拉剪载荷

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51965045)

作者(Author): 亓安泰,吴鸿燕,刘泽民,程东海,成家龙,肖雄

DOI: 10.13289/j.issn.1009-6264.2023-0417

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