Investigation of Sustainable Prospects of Fabricating Galvanized Steel with Gas Metal Arc Welding

Abstract

Welding operations, in general, have been and continue to be critical for daily comfort and pleasure, as well as important in a variety of industries and infrastructure development. Welding technology is constantly evolving, enabling research and innovation in a variety of disciplines and contributing to the creation of more efficient and advanced materials, as well as sustainable solutions. Aside from other aspects, the quality of welding that contributes directly to sound, strong, and safe welded joints without lowering the design yield properties of materials is heavily influenced by the optimisation of welding parameters chosen for the welding project. This research investigates the optimisation parameter values for welding galvanised steel with gas metal arc welding (GMAW) or metal inert gas (MIG). The most optimum of the parameter combinations is chosen using the multi-criteria decision making (MCDM) technique employing Technique for Order Preference by Similarity to Ideal Solution(TOPSIS) analysis, whereas the most influencing parameter is determined by the Signal-to-Noise Ratio and Analytical Variance analysis methods. This investigation, which used TOPSIS, and ANOVA analyses, found that the combination of parameters used to weld 'Specimen 18' was the best combination of parameter optimisation, and that the welding speed ranked highest among the variable parameters chosen, making it the most influential. Following weld speed came root gap, welding current, and shielding gas flow rate.