Abstract— In this experimental work tests were conducted on the weldments of AA6061 aluminium alloy using TIG/GTAW with pulsed current at constant frequency of 6HZ and non-pulsed current on 3mm thick sheets. Destructive and non-destructive tests like Hardness test, tensile test, microstructure, radiography and liquid penetrate tests conducted, evaluated and compared with pulsed and non-pulsed current welding. Aim of the experimental work is to see the effect of pulsed current on characteristics of weldments. The experimental results pertaining to different welding parameters for the above material using pulsed and non-pulsed current GTAW are discussed and compared.
Keywords— AA6061, Tungsten Inert Gas Welding/Gas Tungsten Arc Welding, Pulsed current, Non-pulsed current, Heat Affected Zone
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