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Dissimilar material joining using laser (aluminum to steel using zinc-based filler wire)

Abstract : Joining steel with aluminum involving the fusion of one or both materials is possible by laser beam welding technique. This paper describes a method, called laser braze welding, which is a suitable process to realize this structure. The main problem with thermal joining of steel/aluminum assembly with processes such as TIG or MIG is the formation of fragile intermetallic phases, which are detrimental to the mechanical performances of such joints. Braze welding permits a localized fusion of the materials resulting in a limitation on the growth of fragile phases. This article presents the results of a statistical approach for an overlap assembly configuration using a filler wire composed of 85% Zn and 15% Al. Tensile tests carried on these assemblies demonstrate a good performance of the joints. The fracture mechanisms of the joints are analyzed by a detailed characterization of the seams.
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Submitted on : Thursday, February 4, 2010 - 8:27:14 AM
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Alexandre Mathieu, Shabadi Rajashekar, Alexis Deschamps, Michel Suéry, Simone Matteï, et al.. Dissimilar material joining using laser (aluminum to steel using zinc-based filler wire). Optics and Laser Technology, Elsevier, 2007, 39 (3), p. 652-661. ⟨10.1016/j.optlastec.2005.08.014⟩. ⟨hal-00453170⟩



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