Influence of rotational speed on the electrical and mechanical properties of the friction stir spot welded aluminium alloy sheets

Abstract An efficient and productive joining technique to weld aluminium has become a priority challenge for promoting the use of in electrical industry. One challenges is obtain welds with superior mechanical properties consistent quality surface as well low resistance. In this paper, influence rotational speed during friction stir spot welding AA 5754-H111 was studied analyse welds. The results from two speeds (1000 rpm 4500 rpm) are presented compared base material. It observed that samples welded at 1000 showed higher average shear failure load (~ 1.1 kN) 0.94 kN). microhardness than material, while lower. also found sheets, regardless used, increased resistance albeit increase about 42%, where just 14%.