Abstract
Objectives
In this study, an effort is made to predict the optimized parameter combination in double-pulse MIG welding of stainless steel (SS 304H)—Inconel 617 (IN 617)
Methods
Butt joints were made between IN 617 and SS 304H using ER308 H filler wire having a diameter of 1.2 mm. Welding trials were done based on Taguchi L9 array with wire feed speed, frequency and amplitude as input parameters. The weld quality was evaluated by measuring bead width, depth of penetration, tensile strength and impact strength. The optimized parameter combination was identified using two multiobjective techniques, viz. grey relational analysis (GRA) and technique for order of preference by similarity to ideal solution (TOPSIS).
Conclusions
GRA and TOPSIS gave similar results with regard to optimized parameter combinations. Analysis of variance (ANOVA) was applied to find the most influential parameter on weld quality. From ANOVA, the amplitude was identified as the most influential parameter. The presence of M23C6 and M6C precipitates in the fusion zone helped in strengthening the weld. At higher wire feed speed, lack of side wall fusion was noted on the SS 304H side of the weld.
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Arivarasan, J., Kannan, T.D.B. Optimization of Process Parameters in Double-Pulse MIG Welding of Inconel 617-SS 304 H. Trans Indian Inst Met 75, 1293–1307 (2022). https://doi.org/10.1007/s12666-021-02483-4
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DOI: https://doi.org/10.1007/s12666-021-02483-4