Raza, Muhammad FarhanYapıcı, Güney Güven2023-08-162023-08-162022-012214-7853http://hdl.handle.net/10679/8690https://doi.org/10.1016/j.matpr.2022.04.797Comparison of Interlayer Friction Stir Spot Welding (IL-FSSW) and conventional Friction Stir Spot Welding (FSSW) of 304 stainless steel is presented in this study. IL-FSSW is introduced as a novel spot-welding technique to avoid the keyhole formation at the weld spot. This process is employed to fabricate a joint between two stainless steel sheets. The utilization of an interlayer material prevents the occurrence of keyhole without any additional post-process treatment. In addition, the interlayer material also enhances ductility and provides a joint with a maximum lap shear load of 7 kN. The micrographs of the weld zone cross-section were recorded and it was observed that the interlayer material played a significant role in the development of the nugget zone by supporting the formation of a hook structure.enginfo:eu-repo/semantics/restrictedAccessArticle624291429400083654250001610.1016/j.matpr.2022.04.797Friction stir spot weldingInterlayerJointKeyholeLap shear strengthStainless steel2-s2.0-85129962698