Mechanical properties and microstructure studies in Friction Stir Welding (FSW) joints of dissimilar alloy – a review

Purpose: Friction stir welding (FSW) is a relatively new solid state joining process that uses a non-consumable tool to join two different material without melting the workpiece material. Friction stir welding (FSW) was developed for microstructural modification of metallic material. This review article provides an overview of effect of FSW/FSP mechanism responsible for the formation of weld, microstructure refinement, wear of FSW tool and mechanical properties. This review conclude with recommendations for future research direction. Design/methodology/approach: Heat is generated by friction between the rotating tool and the workpiece material. This joining process is energy efficient, environment friendly and versatile.