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Aluminum alloys are used primarily to produce rings, structural components, automotive systems, and aerospace components. Fusion welds are difficult to perform on these alloys due to their poor joint efficiency, solidification cracking, and alloy segregation in aluminum joints. Thus, solid-state welding techniques are preferred for their higher performance with fewer defects, as well as their eco-friendliness. In the present study, solid-state friction stir welding (FSW) process is used for joining dissimilar aluminum alloys AA5083/AA6061. Weld specimens were fabricated for dimensions of 150 x 150 x 6 mm. The rotational speed, the transverse speed, and the tilt angle were set to 1000 rpm, 25 mm/min, and 2, respectively. The welded specimens were evaluated for their microstructural and mechanical properties. The mode of failure was observed by scanning electron microscope (SEM). As a result, the dissimilar joints …