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Influence of parameters and optimization of EDM performance measures on MDN 300 steel using Taguchi method

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Abstract

Maraging steel (MDN 300) exhibits high levels of strength and hardness. Optimization of performance measures is essential for effective machining. In this paper, Taguchi method, used to determine the influence of process parameters and optimization of electrical discharge machining (EDM) performance measures on MDN 300 steel, has been discussed. The process performance criteria such as material removal rate (MRR), tool wear rate (TWR), relative wear ratio (RWR), and surface roughness (SR) were evaluated. Discharge current, pulse on time, and pulse off time have been considered the main factors affecting EDM performance. The results of the present work reveal that the optimal level of the factors for SR and TWR are same but differs from the optimum levels of the factors for MRR and RWR. Further, discharge current, pulse on time, and pulse off time have been found to play a significant role in EDM operations. Detailed analysis of structural features of machined surface was done by using scanning electron microscope (SEM) to understand the influence of parameters. SEM of electrical discharge machining surface indicates that at higher discharge current and longer pulse on duration give rougher surface with more craters, globules of debris, pockmarks or chimneys, and microcracks than that of lower discharge current and lower pulse on duration.

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Authors and Affiliations

  1. Department of Mechanical Engineering, National Institute of Technology (NIT), Warangal, 506-004, Andhra Pradesh, India

    A. M. Nikalje, A. Kumar & K. V. Sai Srinadh

  2. Department of Mechanical Engineering, Government College of Engineering, Jalgaon, 425001, Maharashtra, India

    A. M. Nikalje

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  1. A. M. Nikalje
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  2. A. Kumar
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  3. K. V. Sai Srinadh
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Correspondence to A. M. Nikalje.

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Nikalje, A.M., Kumar, A. & Srinadh, K.V.S. Influence of parameters and optimization of EDM performance measures on MDN 300 steel using Taguchi method. Int J Adv Manuf Technol 69, 41–49 (2013). https://doi.org/10.1007/s00170-013-5008-8

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  • DOI: https://doi.org/10.1007/s00170-013-5008-8

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