The effect of RFSSW parameters on load capacity of EN AW-6082-T6 aluminum alloy and AlCu bimetallic joints

Abstract This paper presents research into the creation of refill friction stir spot welding (RFSSW) single-lap joints 6082-T6 aluminum alloy and roll-bonded AlCu bimetallic sheet. The latter sheet comprises EN AW-1050A electrolytic copper M1E in Z6 temper condition (after rolling) with a 1:1 ratio Cu:Al layers. parameters involved variable plunge depth time. mechanical properties were determined tensile/shear tests. highest average value load capacity joint was observed made tool d t = 2.6 mm total time w 4 s. for this variant an 5986.75 N standard deviation SD 166.15 N. A plug-type fracture on layer RFSSW produced mm. Increasing rotational speed thus generating heat resulted upper (aluminum alloy). In case 2 equal to thickness sheet, type mode both times found be nugget debonding.