SELECTION OF NON-CONVENTIONAL MANUFACTURING PROCESS: A COMBINE TOPSIS-AHP APPROACH

With increasing usage of high strength material like titanium, ceramics, composite material, stainless steel in different field such as aerospace, nuclear, and steam turbine, which havegenerally high strength, high hardness is usually processed by various Non-Traditional Manufacturing (NTM) processes. But these NTMprocesses consume high power and are too expensive, hence necessitates one optimum NTMprocess for a given material for economical machining.However, the selection of optimum process isa tedious task. It consists of various factors that influence the selection method of machining process.A combine method using the Technique for Order Preference by Similarity to Ideal Solution(TOPSIS) and an “Analytical Hierarchy Process” (AHP) is suggested to select the most suitable non-traditional process for given material and shape feature combination while taking various attributes affecting the NTM selection determination.By the help of combining TOPSIS an AHP method which is based on comparison between various attributes and secondly based on fact that best alternative has least geometric distance from ideal solution and worst alternative has more geometric distance from an ideal solution. After applying combine approach among the available NTM processes viz. USM, WJM, AJM, ECM, CM, EDM, WEDM, EBM, LBM, PAM, AFM,it is found that PAM is a best available process to work with steel material followed by ECM, EDM and EBM respectively.

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