Mechanism of Mg–Al Ultrasonic-Assisted Transient Liquid Phase Bonding
LI Zhuolin1,2, FU Junhong1,2, WANG Jian1,2, WEI Shoujing1,2, SONG Xiaoguo1,2, BIAN Hong1,2
1. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China;
2. Shandong Provincial Key Laboratory of Special Welding Technology, Harbin Institute of Technology (Weihai), Weihai 264209，China
The Mg–Al composite heat dissipation structure has a good application prospect in the aviation industry. In view of the key problem that brittle Al12Mg17, Al3Mg2 compounds are easily generated in the connection of Mg–Al dissimilar materials, this experiment adopts the ultrasonic-assisted transient liquid phase bonding (U-TLP Bonding), and uses pure Zn as the interlayer, the reliable connection of Mg/Zn/Al joint is realized at 350 ℃ . The effect of ultrasonic time on the microstructure evolution and mechanical properties of the joint is studied. Under the optimal process parameters, the joint is mainly composed of Mg+MgZn eutectoid structure, and the average shear strength of the joint reaches 50.2 MPa.
2022, 
