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July 23, 2026Scientific ReportsOpen Access

Performance evaluation and optimization of powder mixed EDM of Inconel 718 using composite electrodes and the VIKOR method

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Authors

SKShabarinathan KTMNM. S. NarassimaJPJana Petru

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Overview

Randomized trial evaluates powder mixed EDM for improving machinability in Inconel 718, indicating significant enhancements.

Key Points

  • This research aims to improve the machining efficiency of Inconel 718 using Powder Mixed EDM with composite electrodes.
  • Analyzed the effects of peak current, pulse on/off time, spark gap, and powder concentration on machining parameters using a L25 Taguchi design.
  • Conducted microstructural analysis to assess graphite distribution and thermal characteristics.
  • Applied the VIKOR method for multi-criteria decision-making to optimize machining conditions.
  • The optimized conditions included 15 A peak current, 2 µs pulse on time, 10 µs pulse off time, a 6 mm spark gap, and 3 g/L powder concentration.
  • Enhancements observed were a significantly improved MRR, reduced TWR, and superior surface finish (Ra).
  • Microstructural analysis confirmed uniform graphite distribution and improved thermal conductivity.

Cite This Study

KT et al. (2026) studied this question.

synapsesocial.com/papers/6a61af56faa9903c5116a394https://doi.org/10.1038/s41598-026-62571-7
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