Al interlayer enhanced interfacial strength of ultrasonically welded copper-titanium dissimilar joints

•Ultrasonic welding of Cu-Ti with Al interlayer was studied.•Interfacial strength evolved from plastic flow and mechanical interlocking.•Large plastic strain caused interface-adjacent cracks, reducing strength.•Introduced Al interlayer prevented base metal damage, improving weld quality.•Al interlay...

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Bibliographic Details
Published inMaterials letters Vol. 367; p. 136582
Main Authors Chen, I-Hsuan, Hsu, Shu-Han, Lin, Jhe-Yu, Ji, Xiaoliang
Format Journal Article
LanguageEnglish
Published Elsevier B.V 15.07.2024
Subjects
Aluminum
Copper
Frictional heat
Titanium
Ultrasonic welding
Ultrasonic welding
Titanium
Copper
Aluminum
Frictional heat
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Summary:•Ultrasonic welding of Cu-Ti with Al interlayer was studied.•Interfacial strength evolved from plastic flow and mechanical interlocking.•Large plastic strain caused interface-adjacent cracks, reducing strength.•Introduced Al interlayer prevented base metal damage, improving weld quality.•Al interlayer increased interfacial strength by 26% via enhanced frictional heat. This study investigated the ultrasonic welding of Cu-Ti joints, revealing that the interfacial strength originated from mechanical interlocking. However, strength was diminished owing to interface-adjacent crack initiation due to excessive plastic strain. Introducing an Al interlayer prevented base metal damage with more frictional heat, and enhanced interfacial strength by 26%.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2024.136582