Effect of Friction Stir Processing on Microstructure and Mechanical Properties of TIG Welded Joint of AA6061 and AA7075

摘要: In tungsten inert gas welding (TIG), micro-cracks, porosity, coarse grain structure and high residual stress distribution were found due to persisting thermal conditions. The TIG welded joint is processed using friction stir processing with input process parameters avoid these defects. present work, the experimental investigation was conducted examine influence of (FSP) on microstructure mechanical properties AA6061 AA7075. Tensile test, Vickers hardness x-ray diffraction, microscopy energy-dispersive test performed for concluding optimum set parameters. tensile results shows that hybrid TIG + FSP had higher strength than filler ER4043, whereas increment in micro-hardness observed. size also decreases when tool pin rotates different It maximum stress, % elongation at nugget zone are 255 MPa, 29.2, 105 HV respectively. demonstrates rotational speed traverse dominating improve joint.