Effects of Process Parameters on Strength of Swept Friction Stir Spot Welded Plate

Swept friction stir spot welding is one of the variations of friction stir spot welding (FSSW). This technique is a solid state joining process that uses a specially designed tool rotates at certain point creates a spot, lap-weld without bulk melting. It causes frictional heating that softens a column of material underneath the tool. The softened material flows around the tool through extensive plastic deformation and is consolidated behind the tool to form a solid-state joint. The main objective of this study is to establish the relevant knowledge on the strength of the swept friction stir spot welded aluminum plate by changing process parameters of the welding.