Unlike mechanical fasteners, joining thermoplastics with friction welding has huge advantages. It has not been many days since welding has been considered a conventional method for joining plastic materials. Friction stir spot welding is a branch of friction stir welding. A lot of research has been going on using materials like thermoplastics and their joining processes. Polyvinyl chloride also known as PVC, is a vastly used thermoplastic. Polyvinyl chloride has numerous applications like packaging, construction, etc. In this study, a Friction stir spot welding experiment was carried out in commercial PVC sheets. The experiments were conducted with different tools having different shapes of pin (triangular, square, circular). The temperature of the heat-affected zone was recorded followed by the cooling curve. Considering tool geometry, the triangular probe showed the highest joining efficiency, as well as the highest peak temperature, which was recorded with the same tool. Friction stir spot welding can add a different dimension in terms of joining polyvinyl chloride and various plastic materials if applied to manufacturing industries.

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