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March 22, 2021Proceedings of the Institution of Mechanical Engineers Part E Journal of Process Mechanical Engineering

Optimizing the powder mixed EDM process of nickel based super alloy

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Authors

SRS. RameshMJM.P. Jenarthanan

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Overview

Experimental study reveals optimal powder-mixed electrical discharge machining settings for Nimonic 75 superalloy, indicating enhanced cutting efficiency and surface finish.

Key Points

  • To investigate the machining performance of the nickel-based superalloy Nimonic 75 under powder-mixed electrical discharge machining and optimize critical operational parameters.
  • Conducted electrical discharge machining experiments on Nimonic 75 based on a Response Surface Methodology (RSM) design using graphite, silicon, and manganese dielectric powder additives.
  • Tested variables including powder concentration, peak current, and duty cycle against material removal rate, electrode wear ratio, and surface roughness.
  • Applied multi-objective optimization using Grey Relational Analysis combined with Fuzzy Logic (GFRG) to establish optimal processing conditions.
  • Graphite powder yielded the highest material removal rate, silicon achieved the smoothest surface finish, and higher duty cycles decreased both removal rate and electrode wear while increasing surface roughness.
  • Optimal multi-response performance occurred using manganese powder at 3 g/l concentration, 4 A discharge current, and a 0.9 duty cycle, with a predictive model error below 6%.

Cite This Study

Ramesh et al. (2021) studied this question.

synapsesocial.com/papers/6a8a3a485c4c6b099dec8b16https://doi.org/10.1177/09544089211002782
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