ABSTRACT Zn–2Al alloy is used as a filler metal for brazing of aluminium 6063 alloys by ultrasonic-assisted resistance brazing (RB) technology. The evolution of the microstructure and phase composition under the effects of the electric field and ultrasonic vibration were studied. The results show that ultrasonic cavitation can remove the existing oxide films effectively and inhibit element segregation, which help obtain joints with good metallurgical bonding. In comparison to RB joints, which exhibit a coarse dendritic structure, a uniform dendritic structure was obtained in the ultrasonic-assisted resistance joints. Furthermore, the combined electric and ultrasonic field has a significant effect on grain size and on dissolution during brazing. With the application of ultrasonic vibration, the diffusion between the base metal and the Zn–2Al filler metal intensifies.

中文翻译：

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超声辅助电阻钎焊接头组织和相组成的演变

摘要 Zn-2Al 合金用作填充金属，用于通过超声波辅助电阻钎焊 (RB) 技术钎焊 6063 铝合金。研究了电场和超声振动作用下组织和相组成的演变。结果表明，超声空化能有效去除现有氧化膜，抑制元素偏析，有助于获得具有良好冶金结合的接头。与表现出粗大树枝状结构的 RB 接头相比，在超声辅助电阻接头中获得了均匀的树枝状结构。此外，联合电场和超声场对钎焊过程中的晶粒尺寸和溶解有显着影响。随着超声波振动的应用，