Weldability and mechanical properties of ultrasonic spot welded Cu/Cu joints
Ultrasonic spot welded Cu/Cu joints with and without Cu nanoparticles (Cu NPs) interlayer were successfully achieved. Cu NPs interlayer, possessing the characteristics of high hardness and low melt point, could promote to eliminate the un-contacted areas in the weld interface and generate more effectively net welded areas, leading to the increase of bond density. The peak T-peel force (279.6 N) of the Cu/Cu joint with Cu NPs interlayer was 18.3% higher than that (236.3 N) of the Cu/Cu joint without Cu NPs interlayer. In addition, for the Cu/Cu joint with Cu NPs interlayer, only welded regions with obvious facture dimples could be observed in the fracture morphology.
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Document Type: Miscellaneous
Publication date: February 1, 2019
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