PARAMETERS AFFECTING MEHANICAL PROPERTIES OF FRICTION STIR WELDED JOINTS ON AA7075-T6 ALUMINIUM ALLOY
Keywords:
AA 7075-T6 Aluminium Alloy, Friction Stir Welding, Tool Pin Profile, FSP Zone, Impact EvaluationAbstract
Friction stir welding is a solid state joining process and is widely being considered for aluminium alloys. The main advantage of FSW is the material that is being welded undergoes only localized changes. The welding parameter and tool pin profile play a major role in deciding the weld quality. In this work an effort has been made to analyze microstructure of aluminium AA 7075-T6 alloy. Three different tool profiles (Taper Threaded and square) have been used to construct the joints in particular rotational speed. Tensile, Impact, micro hardness of mechanical properties of the joints have been evaluated and the formation of FSP zone has been analyzed microscopically. From the investigation it is found that the threaded cylindrical profile produces highly defined Strength in welds. The welding speed is also an important criterion for the strength of weld.
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