Scholarlink

<p>As the most advanced development of low-temperature and high-strength diffusion bonding of Al alloys, the lowest joining temperature of ultrasonic-assisted transient liquid phase (U-TLP) bonding of Al alloys can only be limited to 390&#xa0;°C using Zn interlayer. Further reduction of bonding temperature is an urgent need to avoid strength loss of base metal. In this work, U-TLP bonding of 6063Al alloy only required 350&#xa0;°C, which was achieved in the air by a newly designed composite interlayer of Zn/Mg/Zn. The surface oxide films on metals were broken by the cavitation effect of ultrasonic in Mg-Zn eutectic liquid phase. The joint composition undergone a transition from MgZn<sub>2</sub> + η-Zn to MgZn<sub>2</sub> + η-Zn + Zn-Al eutectoid to MgZn<sub>2</sub> + Zn-Al eutectoid. Final joint of MgZn<sub>2</sub> + Zn-Al eutectoid with a strength coefficient of 100% was obtained only required an ultrasonic vibration of 180&#xa0;s. The initial joint was a brittle structure composed by the&#xa0;MgZn<sub>2</sub> and the&#xa0;η-Zn&#xa0;phases, and it finally transformed to a reinforced structure with a network shape of the&#xa0;Zn-Al eutectoid-coated dispersed MgZn<sub>2</sub> particles. The joint was strengthened due to the Zn-Al eutectoid phase and MgZn<sub>2</sub> hard particles with differences in hardness based on the heterogeneous deformation strengthening theory.</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

High-strength heterostructure joint of 6063Al alloys manufactured by ultrasonic-assisted TLP bonding using an Zn/Mg/Zn composite interlayer

  • 期刊论文

  • 发表日期：

    2025年3月1日

查看全文
  • Yuanming Zhao,
  • Keheng Pu,
  • Guanhong Liu,
  • Pu Zhao,
  • Zhengwei Li,
  • Zhiwu Xu,
  • Jiuchun Yan

摘要

As the most advanced development of low-temperature and high-strength diffusion bonding of Al alloys, the lowest joining temperature of ultrasonic-assisted transient liquid phase (U-TLP) bonding of Al alloys can only be limited to 390 °C using Zn interlayer. Further reduction of bonding temperature is an urgent need to avoid strength loss of base metal. In this work, U-TLP bonding of 6063Al alloy only required 350 °C, which was achieved in the air by a newly designed composite interlayer of Zn/Mg/Zn. The surface oxide films on metals were broken by the cavitation effect of ultrasonic in Mg-Zn eutectic liquid phase. The joint composition undergone a transition from MgZn2 + η-Zn to MgZn2 + η-Zn + Zn-Al eutectoid to MgZn2 + Zn-Al eutectoid. Final joint of MgZn2 + Zn-Al eutectoid with a strength coefficient of 100% was obtained only required an ultrasonic vibration of 180 s. The initial joint was a brittle structure composed by the MgZn2 and the η-Zn phases, and it finally transformed to a reinforced structure with a network shape of the Zn-Al eutectoid-coated dispersed MgZn2 particles. The joint was strengthened due to the Zn-Al eutectoid phase and MgZn2 hard particles with differences in hardness based on the heterogeneous deformation strengthening theory.