In the current research, the influence of multi-pass (one, two and three passes) of friction stir welding and SiC microparticles on the tensile strength, microhardness and %strain of dissimilar reinforced joints of AA6082 and AA5083 was examined. Tool rotating speed of 900 rpm, transverse speed of 45 mm/min, tool tilt angle of 2º and 8% volume percentage of SiC microparticles were considered as constant parameters for multi-pass FSW. The finding demonstrated that increasing the number of FSW passes from one to three augmented the dispersion pattern of Sic microparticles. The grain refinement of multi-pass reinforced joints was achieved by the pinning effect of SiC microparticles and dynamic recrystallization. The three-passes FSWed reinforced joint exhibited the highest tensile strength (247.17 MPa), %stain (13.1%) and microhardness (126.6 HV) due to the higher grain refinement.
