The development of the friction stir welding being a solid state welding has provided an improved way of manufacturing aluminum joints in a quicker and reliable manner. The heat treatable aluminum alloy AA7075 is used substantially in the aerospace industry because of its high strength to weight ratio and good ductility. The objective of our work is to research the parameters of welding on the mechanical properties of friction stir welded joints of AA7075-T651. The parameters namely rotational speeds (500 rpm, 700 rpm, 900 rpm, 1100 rpm, 1300 rpm and 1500 rpm) were thought-about and table transverse speed of 50 mm/min, axial force of 8 KN is constrained throughout the welding process. The result of these parameters on weld quality is analyzed by its mechanical properties namely micro hardness and tensile strength.
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