Parametric Optimisation of Gas Tungsten Arc Welding (GTAW) on the Tensile Strength of AISI 316l Austenitic Stainless Steel Using Taguchi Method

Afabor Abraham Martins, Ikikiru Diatachekor Friday

 

Abstract

This  study utilized the Taguchi robust design of experiments (DOE) technique to find the optimum GTAW parameters on the tensile strength of AISI 316L austenitic stainless steel. Taguchi L9 orthogonal array experiments were performed on 250 mm by 250 mm by mm dimensions of AISI 316L austenitic stainless plate using ER316 filler material. Three GTA welding parameters; welding current, welding voltage, and shielding gas flow rate, were changed up to three levels; low, medium and high. The results that were obtained were analysed using a bigger-the-better option for signal-to-noise S/N ratio and analysis of variance (ANOVA) with the aid of MINITAB 18 software. It was observed that, for optimisation of each response, welding current was the most influential factor with a 65% contribution. Maximum tensile strength was achieved at the welding process parametric combination of welding current of 100 A, welding voltage of 25 V and gas flow rate of 20 L/min.

 

Keywords: Gas tungsten arc welding, Austenitic stainless steel, Tensile strength, Taguchi method, Optimisation 

 

Cite this article as: Afabor Abraham Martins, Ikikiru Diatachekor Friday. (2023). Parametric Optimisation of Gas Tungsten Arc Welding (GTAW) on the Tensile Strength of AISI 316l Austenitic Stainless Steel Using Taguchi Method. Journal of Materials Engineering, Structures and Computation, 1(1), 90–101. https://doi.org/10.5281/zenodo.7525254