摘要
镁–铝复合散热结构件在航空工业领域具有较好的应用前景。针对镁–铝异种材料连接中极易产生脆性Al_(12)Mg_(17)、Al_(3)Mg_(2)金属间化合物的关键问题,本试验采用超声辅助瞬态液相连接工艺(Ultrasonic-assisted transient liquid phase bonding,U-TLP Bonding),以纯Zn作为中间层,在350℃下实现了Mg/Zn/Al接头的可靠连接;研究了超声作用时间对接头微观组织演变和力学性能的影响,在最优工艺参数下,接头中主要为Mg+MgZn共析组织,接头平均抗剪强度达到50.2 MPa。
The Mg–Al composite heat dissipation structure has a good application prospect in the aviation industry.In view of the key problem that brittle Al_(12)M_(17),Al_(3)Mg_(2)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.
作者
李卓霖
符军红
王健
卫首敬
宋晓国
卞红
LI Zhuolin;FU Junhong;WANG Jian;WEI Shoujing;SONG Xiaoguo;BIAN Hong(State Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology,Harbin 150001,China;Shandong Provincial Key Laboratory of Special Welding Technology,Harbin Institute of Technology(Weihai),Weihai 264209,China)
出处
《航空制造技术》
CSCD
北大核心
2022年第21期104-111,共8页
Aeronautical Manufacturing Technology
关键词
超声
瞬态液相连接(TLP)
微观组织
力学性能
冶金机理
Ultrasound
Transient liquid phase bonding(TLP)
Microstructure
Mechanical properties
Metallurgical mechanism
