**6. Conclusions**

FSW is a solid state welding process, where the joining of two plates is performed under recrystallize temperature. Our experiment on aluminum alloy AA 7075 T6 tested different welding parameters, such as welding speed, tool rotating speed ranging from 710 to 1400 rpm, welding speed (tool travel speed) ranging from 60 to 140 mm/min, and three tool pin geometries such as square pin, cylindrical straight pin, and cylindrical threaded straight pin.

From the tensile test results, we obtained a 228.96 UTS at TRS of 710 rpm, WS of 105 mm/min with the square pin.
