The aim of the present study is to show the influence of different input parameters such as welding current, arc voltage root gap on the mechanical properties during the Metal Inert Gas Welding (MIG) of mild steel 1020 grade. The hardness and tensile strength of weld specimen are investigated in this study. The selected three input parameters were varied at three levels. On the analogy, nine experiments were performed based on L9 orthogonal array of Taguchi's methodology, which consist three input parameters. Analysis of variance (ANOVA) was employed to find the levels of significance of input parameters. Arc current has greatest effect on tensile strength followed by root gap and gas flow rate. Root gap has greatest effect on hardness followed by arc current and gas flow rate.
GMAW, MIG, Mild Steel, Welding, Taguchi, ANOVA
