MECHANICAL AND MICROSTRUCTURAL CHARACTERIZATION OF FRICTION STIR WELDED AA 6061 & AA 2024 DISSIMILAR ALUMINUM ALLOY JOINTS

Koona Shiva Prasad, Aruri Devaraju, Kamarapu Santhosh Kumar

Abstract


The effect of tool rotational speed on tensile properties and microhardness of dissimilar Aluminum alloys 6061 & 2024 welds fabricated via friction stir welding (FSW) have been analyzed in this current study. The different weldments are fabricated by diverge the rotational speeds of the tool as 900, 1120 and 1400 rpm. In all the experiments the rotating speed is fixed at 40 mm/min. For both the alloys all the weld produced should be perpendicular to the rolling direction. Microhardness (Hv) and tensile tests are performed at room temperature to evaluate the mechanical properties of the weldments. It is seen that better tensile properties are exhibited at 900 rpm instead of 1120 and 1400 rpm. It is also observed that at 1120 rpm micro hardness is 115 Hv obtained. The observed tensile properties and hardness are correlated with microstructure and fracture features.

Keywords


Friction Stir Welding; 6061 & 2024 Aluminum Alloy; Microstructure; Tensile Properties; Fractography

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DOI: https://doi.org/10.26483/ijarcs.v8i9.5060

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