Interfacial microstructure and strength of steel/aluminum alloy joints welded by resistance spot welding with cover plate
- 14 November 2008
- journal article
- Published by Elsevier BV in Journal of the American Academy of Dermatology
- Vol. 209 (8), 4186-4193
- https://doi.org/10.1016/j.jmatprotec.2008.11.003
Abstract
We joined aluminum alloy A5052 to cold-rolled steel SPCC (Steel Plate Cold Commercial) and austenitic stainless steel SUS304 using resistance spot welding with a cover plate. The interfacial microstructure was observed using transmission electron microscopy. A thick two-layered reaction layer contains Fe2Al5 and FeAl3 and a thin serration reaction layer contains Fe2Al5 and FeAl3 were observed at the A5052/SPCC and A5052/SUS304 interface, respectively. Mechanical property analysis suggested that the reaction layer has no effect on the tensile shear strength of the A5052/SUS304 joint and that the tensile shear strength of the A5052/SPCC joint is influenced by the reaction layer formed at its interface.Keywords
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