Abstract
Welding process parameters can plays a very significant role in determining the quality of the welded joint in metal inert gas (MIG) welding operation. The elaborated experiments and analysis have been needed to precise control of the MIG welding process to obtain the desired quality characteristics in welded specimens. Present work is planned to study and analyze the effects of welding parameters: welding current, gas flow rate and nozzle to plate distance, on ultimate tensile strength (UTS) and percentage elongation (PE) in MIG welding of AISI409 ferritic stainless steel materials. Experiments have been conducted as per L9 orthogonal array of Taguchi method. The visual inspection and X-ray radiographic test has also been conducted in order to detect surface and sub-surface defects of welded specimens. The observed data of UTS and PE have been interpreted, discussed and analyzed with use of Taguchi methodology and analysis of signal to noise ratio. Some conclusive remarks have been drawn from the study.
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