INFLUENCES OF TOOL PIN PROFILE ON THE MECHANICAL AND METALLURGICAL PROPERTIES OF FRICTION STIR WELDING OF DISSIMILAR ALUMINUM ALLOY
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ABSTRACT:
The development of the Friction Stir Welding has provided an alternative improved way of producing aluminium joints, in a faster and reliable manner. In this study the effect of tool pin profile on the mechanical and metallurgical properties of dissimilar AA6351- AA5083H111 joints produced by FSW is analyzed. Five different tool pin profiles are developed such as straight cylindrical, threaded cylindrical, square, tapered square, and tapered octagon to weld the joints. All the welds are produced perpendicularly to the rolling direction for both alloys. Tensile tests are performed to evaluate the mechanical properties by using computerized universal testing machine. Color metallographic is carried out along various zones of the friction stir welded .Among the five tools square pin profile give better tensile strength and the stirred zone of the welded area has finer grains compared to other weld zones.
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