DOI: https://doi.org/10.21203/rs.3.rs-2313610/v1
This work attempts to optimize the welding process parameters for a dissimilar metal joint made of duplex stainless steel (DSS) to grade ASTM/UNS S32205 and weathering steel CORTEN-A to grade ASTM A242. Such a dissimilar metal joint finds use in the transportation sector, particularly in the construction of rail cars. The study has taken into account the square butt joint between 2 mm thick sheets welded using the gas metal arc welding (GMAW) process with CO2 as the shielding gas and flux cored wire of grade 309L as the filler material. The tensile strength of the resulting weld joint, which was the desired quality characteristic, was optimized using the L9 Taguchi array. For optimization, GMAW process parameters like voltage, wire feed rate, and welding speed at three levels are taken into account. Using ANOVA, the effects of each factor have been studied. It was found that the ideal set of parameters exists, and that the voltage is the most crucial factor. A confirmation test was carried out to verify the results, and it was wrapped up with a figure and tables.