Scholarlink

<p>In this study, ultrasonic spot welding (USW) is performed on AZ91D Mg alloy and T2 pure Cu. The fracture surfaces, microstructures, and mechanical properties of the joint are analyzed. In addition, the performance of the joint is improved by adding a Zn foil interlayer at the interface of the Mg/Cu joints. The studies show that with the increase of welding energy, the thickness of the diffusion layer also increases, while the shear properties of the joint exhibit a trend of first increasing and then decreasing. The addition of the Zn interlayer not only prevents the formation of Mg-Cu intermetallic compounds (IMCs), but also forms Mg-Zn eutectic structure at the interface, thus improving the joint performance. The maximum tensile shear strength of the joint with the Zn interlayer is increased by 34.67% compared to that without the interlayer, and the fracture mode changes from brittle fracture to mixed fracture.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Study on the Influence of Zn Interlayer on the Microstructure Evolution of AZ91D/T2 Dissimilar Metal Ultrasonic Spot Welding Joints

  • 期刊论文

  • 发表日期：

    2026年5月26日

查看全文
  • Jiaming Chen,
  • Chong Wang,
  • Weihao Chen,
  • Jinsong Huang,
  • Xiaoluan Fan,
  • Longhua Nie,
  • Langping Wang,
  • Guohong Ma

摘要

In this study, ultrasonic spot welding (USW) is performed on AZ91D Mg alloy and T2 pure Cu. The fracture surfaces, microstructures, and mechanical properties of the joint are analyzed. In addition, the performance of the joint is improved by adding a Zn foil interlayer at the interface of the Mg/Cu joints. The studies show that with the increase of welding energy, the thickness of the diffusion layer also increases, while the shear properties of the joint exhibit a trend of first increasing and then decreasing. The addition of the Zn interlayer not only prevents the formation of Mg-Cu intermetallic compounds (IMCs), but also forms Mg-Zn eutectic structure at the interface, thus improving the joint performance. The maximum tensile shear strength of the joint with the Zn interlayer is increased by 34.67% compared to that without the interlayer, and the fracture mode changes from brittle fracture to mixed fracture.