Microstructure and mechanical performances of ultrasonic spot welded Al/Cu joints with Al 2219 alloy particle interlayer. (15th February 2016)

• Record Type: Journal Article
• Authors: Ni, Zenglei; Zhao, Hongjian; Mi, Pengbo; Ye, Fuxing
• Is Part Of: Materials & design. Volume 92(2016)
• Page Start: 779
• Page End: 786
• Publication Date: 2016-02-15
• Subjects: Aluminum -- Copper -- Al 2219 alloy particle -- Ultrasonic spot welding -- Hardness -- Lap shear tensile strength; Materials -- Periodicals; Engineering design -- Periodicals; Matériaux -- Périodiques; Conception technique -- Périodiques; Electronic journals; 620.11
• DOI: 10.1016/j.matdes.2015.12.132
• Languages: English
• ISSNs: 0264-1275

Abstract

Abstract: Copper and aluminum metals with Al 2219 alloy particle interlayer were jointed together utilizing ultrasonic spot welding (USW) at different welding energy ranging from 600 J to 1500 J. The microstructure, hardness and lap shear tensile strength of the joints were studied. The results show that, with increasing the welding energy, the lap shear tensile strength had an increasing trend and the hardness of aluminum metals decreased. The maximum tensile strength reached about 83 MPa at 1500 J welding energy, and the failure location was in the copper metal. There are no IMCs produced across the Cu/interlayer interface. Meanwhile, the Al 2219 alloy particle interlayer has a significant effect on the mechanical performance. Graphical abstract: Highlights: The Al/Cu joints with Al2219 alloy particle interlayer were jointed using ultrasonic spot welding. Al2219 alloy particle interlayer is beneficial to the heat generation in the welding interface. As the welding energy increases, the lap shear tensile strength had an increasing trend. The Al/Cu joints with a good lap shear tensile strength were obtained.