Title: Improvement of surface quality in electric discharge machining of metal matrix composite by using hybrid approach

Authors: Ram Sajeevan; Avanish Kumar Dubey

Addresses: Mechanical Engineering Department, Mahamaya Polytechnic of Information Technology, Kannauj (U.P.), India ' Mechanical Engineering Department, Motilal Nehru National Institute of Technology, Allahabad, Prayagraj (U.P.), India

Abstract: Surface integrity (SI) obtained after electrical discharge machining (EDM) is an important surface quality parameter that needs attention. Micro-hardness (MH), recast layer thickness (RLT) and micro-cracks (MCs) are few important SI parameters of EDM surface. Nowadays, researchers are very serious to improve these parameters by hybridising the EDM with other mechanisms, keeping this in view, magnetic force-assisted powder mixed EDM (MFPEDM) was proposed for this study. The present research article aims is to compare the machining performances of the MFPEDM with the conventional EDM (CEDM) on the machined surface of aluminium titanium die-boride (Al-TiB2) metal matrix composite (MMC). And studies have also been carried out the modelling and optimisation of the machining performances of MFPEDM and CEDM by using a hybrid approach of artificial neural network-genetic algorithm (ANN-GA). The comparison results elucidate that MFPEDM, has praiseworthy improvement in MH, RLT, and MCs at average values and optimum values when compared with CEDM.

Keywords: electrical discharge machining; EDM; metal matrix composite; MMC; MFPEDM; micro-cracks; micro-hardness; recast layer thickness; RLT.

DOI: 10.1504/IJMMM.2024.139061

International Journal of Machining and Machinability of Materials, 2024 Vol.26 No.2, pp.173 - 191

Received: 04 Jan 2024
Accepted: 17 Feb 2024
Published online: 10 Jun 2024 *

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