Abstracto

Optimization of Process parameter of TIG welding of AZ61 Mg Alloy

D.Mahadevi , M.Manikandan

Tungsten inert gas welding process is a multi-input and output process in which the resultant joint strength is governed by both individual and combination of process parameters. The identification of suitable combination parameter is crucial to get desired quality of welded joint and hence, there is need for optimization of tungsten inert gas welding process to achieve a sound weldment. The present work is based on the TIG welding process parameters on welding of AZ61 magnesium alloy. The design of experiment is done by Response surface methodology techniques to find the desired welding conditions for joining similar AZ61 magnesium alloy material. Analysis of variance methods were applied to understand the TIG welding process parameter. The considered parameters are welding current, welding speed, arc voltage, electrode stick out, while the desired output responses are tensile strength and percentage elongation of the welding joints. From the results of the experiments, mathematical models have been developed to study the effect of process parameters on tensile strength and percentage elongation. Optimization is done to find optimum welding conditions to maximize tensile strength and percentage elongation of welded specimen.