Study on magnesium and chromium fillers in friction stir welded dissimilar joint of aa6082 and aa5052

Abstract

The friction stir welding is a modern metal joining method, which was introduced in 1991 by The Welding Institute at Cambridge, in the United Kingdom. Friction Stir Welding (FSW) technique is a solid state metal joining process. The metal on welding does not melt and recast. Some of the defects commonly encountered in FSW are tunnel defect, kissing bond, cracks, pin holes and pipping defects. The defects occur because of improper metal mixing and lower heat input in the weld nugget zone. Only a literatures have focused on the area of filler material and the process parameters on producing a defect free weld with optimal responses. In the fusion welding process, a filler rod is employed to form a quality weld with superior mechanical properties. In this work magnesium and chromium powders are used as filler materials. The objectives of this research is to evaluate the effect of these filler materials and process parameters on the formation of sound joint in weld nugget zone as well as on mechanical properties and corrosion behaviour of the welded joints. newline newline newline newline