Multiple Parameter Optimization Of Cryogenic Micro-Edm Process On Inconel- 825 Using Topsis Methodology

N.Sulakshna, V.Chittaranjan das

The procedure for arrange preference by similarity to ideal solution (TOPSIS) method of optimization is used to analyze the process parameters of the cryogenic micro-Electrical discharge machining (micro-EDM) by using liquid N2 on INCONEL-825 with multi-performance characteristics. The Taguchi method of experimental design L27 is performed to obtain the optimal parameters for inputs, including feed rate, current, pulse on time, and gap voltage. Several output responses, such as the material removal rate, electrode wear rate, overcut, taper angle, and circularity at entry and exit points, are analyzed for the optimal conditions. Among all the investigated parameters, feed rate, current exerts a greater influence on the hole quality. ANOVA is employed to identify the contribution of each experiment. The optimal level of parameter setting is maintained at a feed rate of 4 μm/s, a current of 20 A, a pulse on time of 10 μs, and a gap voltage of 10 V. Scanning electron microscope analysis is conducted to examine the hole quality. The experimental results indicate that the optimal level of the process parameter setting over the overall performance of the micro-EDM is improved through TOPSIS.

Volume 12 | Issue 2

Pages: 2948-2957