A Review on Effects of GTAW Process Parameters on weld
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2016, Vol 4, Issue 1
Abstract
Different process parameters of Gas Tungsten Arc Welding (GTAW) affects the weldment quality. Increasing welding current increases the deposition rate and reduces the hardness. Direct current electrode negative (DCEN) polarity provides deep penetration as compared to Direct current electrode positive (DCEP) and Alternating Current (AC) polarity. Increase in welding speed decreases the bead width and depth of penetration. Depth of penetration and deposition rate decreases with increase in welding voltage. At high voltage, arc length increase which results in wider bid width. Different combination of shielding gases shows different effect on arc plasma which mainly depends upon gas properties such as electrical conductivity, molecular weight, ionization temperature etc. Arc velocity, current density and heat flux decreases with increase in tip angle of electrode.
Authors and Affiliations
P. P. Thakur, A. N. Chapgaon
Keywords
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