Optimization of A-TIG welding of duplex stainless steel alloy 2205 based on response surface methodology and experimental validation

Abstract

In the present work, optimum A-TIG welding process parameters have been determined using the design of experiments approach to achieve the desired depth of penetration (DOP) during welding of duplex stainless steel (DSS) alloy 2205. The design matrix for welding experiments was generated using the central composite design of response surface methodology. Bead-on-plate welds were made on 10 mm thick DSS alloy 2205 plates to generate data and to study the influence of process parameters on DOP. ANOVA analysis was carried out to determine the significance of the process parameters. Current was found to be a significant parameter influencing DOP. A second-order response surface model was developed to predict the response for the set of given input process parameters. Then, numerical and graphical optimization was performed to obtain the maximum DOP using desirability approach. Validation of the model showed good agreement between the predicted and actual values of DOP.

Keywords

A-Tungsten inert gas welding response surface methodology optimization process parameters duplex stainless steel desired depth of penetration bead width desirability approach

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