Experimental Investigation for Enhancing Mechanical Properties of Friction Stir Welding AA6351-T6 Alloy with Copper Powder Inclusion at Welding Zone

Present research work is focused on Friction stir welding (FSW) to butt joint of 6 mm thickness AA6351-T6 aluminium alloys with copper powder inclusion at welding zone. Straight cylindrical tool pin profile is used to carry out joining process with parameters and to evaluate the mechanical properties like tensile strength, yield strength, Vickers hardness and microstructural characterization of the weldments as per standards. It is observed that Ultimate Tensile Strength (UTS) of 228 N/mm2 and Yield Strength (Y.S) of 201 N/mm2 respectively found at parameters of 1200 rpm and 30 mm/min. Vickers hardness test performed at various zones of weldments on all the specimens and got (93 HV) at the weld zone, parameters of 1200 rpm and 30 mm/min as highest among all other specimens. Scanning Electron Microscopy (SEM) was carried out on tensile rupture surfaces of the specimens.