Abstract
Weld bead geometry influences mechanical properties, microstructure of the weld joint or weld overlay. It is much biased by heat input of a particular welding technique. In current work, weld bead of 316 austenitic stainless steel is produced on E250 low alloy steel by gas metal arc welding process using 100% carbon dioxide as shielding gas. Nine sets of welding current and welding voltage combinations were chosen for producing nine weld beads, keeping travel speed constant throughout the experiment. Two identical set of experiments were repeated. Experimental results depicted that the width of weld bead, PSF, RFF extended with increment in heat input, while height of reinforcement and depth of penetration declined slightly for the identical condition. Quadratic equations are generated successfully between different bead geometry parameters and heat input by means of polynomial regression analysis which agree with the real data.
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