USING THE ORTHOGONAL ARRAY WITH GREY RELATIONAL ANALYSIS TO OPTIMIZE TIG WELDING OF AISI 310 AUSTENITIC STAINLESS STEELS

The present work is planned to study some aspects of tungsten inert gas welding (TIG) of AISI 310 austenitic stainless steels. Emphasis has been given to identify the effect of welding parameters on the quality of butt-welded joints. TIG welding has been carried out as per L9 orthogonal array of Taguchi method. After welding, ultimate tensile stress and percentage elongation have been measured. Grey based Taguchi methodology has been used to analyze and optimize the multi responses: ultimate tensile stress and percentage elongation. Statistical technique analysis of signal-to-noise ratio has been used to identify the significance of welding variables on output responses. The optimal combination of processing welding parameters for simultaneous optimization of both the responses has been obtained by Taguchi method. The confirmatory test has been conducted to validate the predicted welding results