Optimization of GTAW process parameters on mechanical properties of AA 7075-T6 weldments

Abstract

This works mainly pertains to improvement in the mechanical properties of AA 7075-T6 aluminium alloy welds through gas tungsten arc welding (GTAW) process. Design of experimental technique Taguchi was applied to optimize GTAW process parameters of AA 7075-T6 aluminium alloy welded joints for improving the mechanical properties. Mathematical model was developed by Regression. Adequacy of developed model was checked by analysis of variance. The effect of heat treat on mechanical properties was also studied and an improvement in the mechanical properties was observed. Metallography of heat treated and non-heat treated welded joints correlated with the mechanical properties.