Author(s)

E. A. El-Danaf, M. M. El Rayes

Abstract

5754–6082 aluminum alloys are friction stir welded at 1070 rpm/140 mm/min, and the welded joint was observed to be defect free. The friction stir welded plate was, further, rolled at an intermediate temperature of 250°C in the direction of the weld line. The effect of post weld treatment by isothermal heating or shot peening or combination of both, on the mechanical properties, was investigated. The welded section was characterized by optical microscopy, hardness mapping and X-ray diffraction, on the transverse section. Tensile samples were wire-cut having the weld nugget in the middle of the gauge length. Enhancement of yield, tensile strength and percentage of elongation to failure was noted, for specific post weld treatment conditions.

Keywords

friction stir welding, aluminium alloys, post weld treatment, shot peening