Optimization of Welding Parameters to Enhance Mechanical Properties of Az31b Magnesium Alloy Gta Welds

Abstract

In the current technological advancement, a light weight metal i.e. AZ31B magnesium – alloy is widely considered in various strategic sectors as this alloy has better welding quality and superior corrosion resistance. Magnesium alloy is one of the superior alloys for its better weight to strength ratio. To obtain optimum weld quality, selection of appropriate welding parameters plays vital role in enhancing weld quality and better mechanical properties. In present study, welding of AZ31B – magnesium –alloy is carried out by using GTAW (Gas tungsten arc welding). Effect of process parameters on weld joint for ultimate tensile strength, hardness characteristics are explained by statistical method. GATW is the fusion method which joins the metal in an inert atmosphere to produce quality weld joints with better properties. This welding technology is predominant in the manufacturing sector. The purpose of this study is to optimize welding parameters for better weld penetration and weld quality. Experimentation and analysis with appropriate range of welding process parameters were carried through analysis of variance (ANOVA). One of the influencing weld parameter is welding current. Developing suitable mathematical model is the prime objective of to obtain optimal process parameters to attain better mechanical properties. The derived mathematical model was harmonized with signal to noise ratio and desirability approach to achieve better ultimate tensile strength and hardness upon AZ31B alloy by GTAW.