Influence of the Tool Rotational Speed on Physical and Chemical Properties of Dissimilar Friction-Stir-Welded AA5083/AA6060 Joints

Aluminum alloys have been successfully used in the railroad and automotive industries because of their potential to significantly reduce component weights, good mechanical anti-corrosion properties. Problems with joining aluminum are characterized by low weldability, which influences need for studies focused on unconventional methods. The environmentally friendly low-cost friction-stir-welding method enables material be joined without melting. In following study, dissimilar butt joints were produced from AA5083 AA6060 alloys. A constant tool traverse speed 100 mm/min a tilt angle 2º used, combined rotational speeds 800, 1000 1200 RPM. It was revealed that as increases, hardness weld nugget zone due higher heat input more effective recrystallization. highest observed speed, equal 1.07 GPa, compared both parent materials 0.75 1.15 GPa AA6060, respectively. Increasing also decreased heat-affected zone, where recrystallization not observed. lowest density dislocations mobility side, contributed reduction strength this zone. welds exhibited corrosion resistance between materials, current being 6.935 ± 0.199 µA·cm?2 at