Authors : P. Manavalan and S. Ravi
Abstract: A study was carried out on Pulsed Gas Metal Arc Welding (P-GMAW) of AISI 904 L super austenitic stainless steel with a thickness of 5 mm and a filler wire of diameter of 1.2 mm. The joints were made with different process parameters, peak current (Ip), pulse time (tp), pulse frequency (f), back ground current (Ib) and welding Speed (S) were considered as the input responses. Central composite rotatable design was used to carry out the experimental design and predict the effects of input and output responses. The processed joints were evaluated to obtain good welded joints in terms of good bead profile and mechanical properties such as bead width, tensile strength, percentage of elongation, impact strength and micro hardness of the welds which were considered as the output responses. Super Austenitic Stainless Steel (SASS) normally contains high amount of Mo, Cr, Ni, N and Mn. In order to solve a multi response optimization problem, the traditional Taguchi approach is not sufficient to get more appropriate results. To get appropriate and accurate results, a multi criteria decision making approach, namely, Techniques for Order Preference by Similarity to Ideal Solution (TOPSIS) technique was preferred and the same was applied in the present study. The Analysis of Variance (ANOVA) was carried out to investigate the significant process parameter for the pulsed gas metal arc welding process. Confirmation experiment was also conducted to validate the optimized parameters obtained from TOPSIS.
P. Manavalan and S. Ravi, 2019. Multi Response Optimization of Pulsed Gas Metal ARC Welding Process Parameter of AISI 904 L Super Austenitic Stainless Steel using Topsis Approach. Journal of Engineering and Applied Sciences, 14: 4940-4950.