TWI

Friction stir welding was employed to fabricate dissimilar joints between 5A06-H112 aluminium alloy (Al, 5.8-6.8%Mg, 0.5-0.8%Mn) and 304L stainless steel (0.03%C, 18-20%Cr, 8-11%Ni) and material flow behaviour was investigated by microstructure observations as well as chemical composition and microhardness determinations. Welding was performed using a high-speed rotational tool made from a hard alloy steel at a rotational speed of 600 rpm, welding speed of 50 mm/min and pin offset of 0.4 mm. Microstructure was observed by optical microscopy and Vickers microhardness was measured with a microhardness tester. Results from chemical composition testing were used to show intermetallic compound formation in the upper retreating side and in the retreating side thermomechanically affected zone.

10th International Symposium, 20-22 May 2014, Session 11A: Dissimilar II, Paper 01