Influence of SiC Microparticles and Multi-Pass FSW on Weld Quality of the AA6082 and AA5083 Dissimilar Joints

Abstract

In the current research, the influence of multi-pass of friction stir welding and SiC microparticles on the tensile strength, microhardness, and %strain of dissimilar reinforced joints of AA6082 and AA5083 was examined. A tool rotating speed of 900 rpm, a transverse speed of 45 mm/min, a tool tilt angle of 2º and 8% volume percentage of SiC microparticles were considered as 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), % strain (13.1%), and microhardness (126.6 HV) due to the higher grain refinement.