“…The studies have focused on the weldability of the same or different material pairs using FSW and the effects of process parameters on the welding quality. AA6082 [ 17 ], AA6063/AA5052 [ 16 ], AA5083/Cu [ 18 ], Al/mild steel [ 19 ], 304 austenitic stainless steel/Q235 low carbon steel [ 20 ], AA7075/AZ31B [ 21 ], AA3103/AA6063 [ 22 ], HDPE-HDPE [ 23 , 24 ], PE-PP [ 15 ], PLA [ 4 ], polimetil metakrilat (PMMA) [ 25 ] are examples of material pairs joined using FSW. However, studies on joining thermoplastics with FSW are scarce in the literature [ 26 ].…”