Friction Stir Welded Magnesium AZ31B Alloy Used to Evaluate Mechanical Properties at Various Rotational Speeds

In this research work, Tensile, hardness, % elongation, density and micro structure analysis on Friction Stir Welded (FSW) magnesium alloy (Mg AZ31B) specimen was examined as per ASTM E8/E8M11 and ASTM E3/E112 at various rotation speeds between 900 and 1440 rpm, with fixed 40 mm/min at 2° High Speed Steel tool tilt angle. The metal matrix plate was produced by stir casting technique. At 1120 rpm, the ultimate tensile strength of the fabricated specimen is higher than those at 900 and 1140 rpm. But higher hardness showed at 1440 rpm than at 900 and 1120 rpm. At 900 rpm, the density of the stir zone joint is lower than that of the other joints. From this comparative analysis, it is evident that the value of FSW specimen was dependent on involvement of heat and material flow rate, which are achieved by process parameters.