Experimental investigations on the influence of tool pin profiles and scandium interlayer on the friction stir welding of dissimilar AA5083 H 111 and AA5754 H 111 plates

Abstract

The Friction Stir Welding (FSW) process is a solid-state welding newlinemethod that joins similar and dissimilar ferrous or non-ferrous materials with newlinea technique which uses a non- consumable rotating tool to create frictional newlineheat and distortion at the welding position, thereby upsetting the development newlineof a joint in a solid-state. The aluminium (Al) alloys AA5083 and AA5754 newlineare non-heat-treatable alloys and are widely used for marine applications, newlineusually in a ship hull, aircraft, automobile components and cryogenic tanks. The newlinemost common applications of AA5083-H11 and AA5754-H111 joints are found newlinein automotive suspensions, steering racks, vehicle power-train shafts, engine newlinevalve components, etc. newlineMost manufacturing industries are currently using lightweight newlinematerial as a replacement for steel to form a lighter and stronger structure. newlineThis gives way to greater importance to the advancement of joining processes newlineto allow interlocking formed by the material itself as an alternative to using newlinerivets, bolts, adhesives, or any other mass addition. FSW has gained more newlineattention for replacing conventional mechanical fasteners and other fusion newlinewelding techniques since it does not melt the materials being welded and newlinemoderately softens them. This study investigates the microstructure and newlinemechanical properties of the FSWed joint of 5083 and 5754 dissimilar alloys. newlineIt also focuses on improving weld quality and mechanical properties by newlineadequately selecting and optimizing various process parameters involved in newlinethe FSW. newline newline