田雄文,王俭辛,何亚斌,翟畅,陈书锦

• 1:江苏科技大学材料科学与工程学院
• 2:长安马自达汽车有限公司

摘要(Abstract)：

为提高铝/钢搭接结构的连接强度并实现结构轻量化，基于铆接辅助搅拌摩擦焊接思路，提出在钢侧预加工出燕尾槽结构，成功实现了中厚板铝/钢异种金属的自铆接搅拌摩擦搭接焊接，研究了搅拌头倾角对于接头性能的影响。结果表明：搅拌头倾角对接头成形影响显著，倾角较小时(θ<2°)时，接头表面易出现隧道缺陷；随着倾角增大，界面金属间化合物由硬脆的FeAl_2相转变为韧性较好的FeAl相，且厚度有所增加，接头抗剪切力呈先增大后减小的趋势，在倾角θ=3°时达到最大值25.1 kN;此外，通过对不同倾角时接头断口形貌的分析发现，接头断裂模式为韧脆混合断裂。随着搅拌头倾角的增加，断口表现出更加显著的韧性断裂特征。

关键词(KeyWords)： 搅拌摩擦焊接;搭接接头;搅拌头倾角;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(52275339)

作者(Author): 田雄文,王俭辛,何亚斌,翟畅,陈书锦

DOI: 10.13289/j.issn.1009-6264.2024-0450

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