Enhanced mechanical properties of friction stir welded dissimilar Al–Cu joint by intermetallic compounds

• Published in: Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 527; no. 21; pp. 5723 - 5727
• Main Authors: Xue, P., Xiao, B.L., Ni, D.R., Ma, Z.Y.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 20-08-2010; Elsevier
• Subjects: Aluminum; Aluminum base alloys; Applied sciences; Copper; Dissimilar joint; Elasticity. Plasticity; Exact sciences and technology; Friction stir welding; Heat affected zone; Intermetallic compounds; Intermetallics; Joining, thermal cutting: metallurgical aspects; Materials science; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology; Metallurgy; Metals. Metallurgy; Welding; Dissimilar joint; Intermetallic compounds; Copper; Aluminum; Friction stir welding; Scanning electron microscopy; Aluminium base alloys; Mechanical properties; Transition metal; X ray diffraction; Tension test; Transmission electron microscopy; Heat affected zone; Interface
• ISSN: 0921-5093; 1873-4936
• DOI: 10.1016/j.msea.2010.05.061

Aluminum and copper plates were successfully friction stir welded by offsetting the tool to the aluminum side, producing excellent metallurgical bonding on the Al–Cu interface with the formation of a thin, continuous and uniform Al–Cu intermetallic compound (IMC) layer. Furthermore, many IMC particles were generated in the nugget zone, forming a composite structure. Tensile tests indicated that the FSW joint failed in the heat-affected zone of the aluminum side with the Al–Cu interface bonding strength being higher than 210
MPa.