This paper investigates the influence of collision angle on the interface characteristics and mechanical properties of magnetic pulse welded AA4014 tubes/Cu rods. It is shown that the collision angle, which affects the collision velocity, plays a crucial role in controlling the thickness of intermetallic compounds (IMC) layer and defect formation at the weld interface. The creation of a thin and continuous IMC layer at the weld interface is responsible for the higher load-bearing capacity of the sample welded under a collision angle of 4°. The welds made at higher collision angles are featured by a thick IMC layer containing defects such as micro-cracks, pores and cavities, which reduced the load-bearing capacity of the joint.

中文翻译：

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异种Al/Cu磁脉冲焊接中碰撞角的作用

本文研究了碰撞角度对磁脉冲焊接AA4014管/铜棒界面特性和力学性能的影响。结果表明，影响碰撞速度的碰撞角在控制金属间化合物（IMC）层的厚度和焊缝界面缺陷的形成方面起着至关重要的作用。在焊接界面处形成薄而连续的 IMC 层是在 4° 碰撞角下焊接样品具有更高承载能力的原因。碰撞角较大的焊缝具有较厚的 IMC 层，含有微裂纹、气孔和空洞等缺陷，降低了接头的承载能力。