COMPARATIVE ANALYSIS OF FSW AND TIG WELDING PROCESS FOR JOINING DISSIMILAR ALUMINIUM ALLOYS AA6082 AND AA1100 BASED ON MULTI RESPONSE OPTIMIZATION USING ENTROPY-TOPSIS APPROACH

In present experimental investigation with comparative analysis of friction stir welding, FSW and tungsten inert gas welding, TIG process for joining dissimilar aluminium alloys AA6082 and AA1100 along with multi response optimization carried out by employing the Entropy- TOPSIS method approach. Varying process parameters selection done for both processes such as for FSW rotational speed as 1000 to 1200 rpm, welding speed as 35 to 45 mm/min, shoulder diameter as 20 to 22 mm and for TIG welding current as 110 to 130A, gas flow rate as 10 to 15 ltr/min, root gap as 2.5 to 3 mm. Responses of process parameters selected was tensile strength, hardness and percentage of elongation for both welding processes. During this investigations effect of selected mechanical properties studied and results were optimized for both the processes. These optimized results of both welding processes were compared on different resulted value criterion. On the basis of compared analysis it was found that friction stir welding performed better in selective mechanical properties compared to tungsten inert gas welding.