Strength of 6191 aluminum bronze stud joints by friction welding

Stud joints of C6191 aluminum bronze were friction welded and its joint strength was examined. A hardened stir zone formed at the weld interface and its width increased with a friction time. In the tensile testing, since all friction welded joints fractured in the plate side, friction weldability of C6191 stud joints was good. Contrary, arc stud welded joints fractured at the weld zone and there were blowholes. In the bending testing, friction welded joints were fractured near the weld zone at bending angle of about 5°. In the fatigue testing, friction welded joints fractured near the weld zone and the fatigue limits of joints were 90-115MPa.