Effect of Tool Rotating Speed on Microstructure and Mechanical Properties of Dissimilar Friction Stir Welded AA5052-H32 and AA6082-T6 Aluminum Alloys

Abstract

Friction stir welding of aluminum alloy has grown in importance in manufacturing areas such as shipbuilding, aircraft manufacture, railways, and automotive. The microstructure and mechanical characteristics of a welded junction are improved by friction stir welding of alloy joints. While the mechanical properties have been the subject of several prior research, none of these have explicitly looked at the effects of tilt angle and speed. Combining two different aluminum alloys, but assessing the structural and examining effects of various factors, such as tilt angle (2°), travel speed (60, 90, and 120 mm/min), and rotational speed (600, 900, and 1200 rpm), an FSW machine was used to weld two dissimilar alloys, AA5052-H32 and AA6082-T6. Formerly, the microstructural features, macrostructural studies, and optical scanning electron microscope (SEM) investigations of the tensile characteristics of these dissimilar welded joints in five zones, including the nugget zone, produced a maximum hardness value of HV115 and a joint efficiency of 56%. Mechanical properties of the welded joints are evaluated with tensile strength, elongation, yield load, and yield stress, and it is found that these properties are gradually increased.