Abstract
This paper compares temperature distribution and weld bead profiles of constant current and pulsed current gas tungsten arc welded AZ31B magnesium alloy joints. The effect of pulsed current welding on tensile properties, hardness profiles, microstructural features and residual stress distribution are reported. The use of pulsed current technique has been found to improve the tensile properties of the welds compared to those of continuous current welds due to grain refinement occurring in the fusion zone.
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