<p>This work investigates the numerical modeling of micro-EDM operation on superalloy Inconel 718. The developed numerical model characterizes the crater's shape, surface temperature distribution, and material removal rate (MRR). Inconel 718 is a superalloy primarily composed of nickel and chromium, commonly used in harsh environments where components must withstand high temperatures, pressure, and mechanical stress. The nontraditional machining process, micro-EDM, is more promising for machining such superalloys. However, selecting the optimal input process parameters for achieving the desired machining performance in micro-EDM is particularly challenging due to the involvement of multiple input variables, especially when machining complex materials like Inconel 718. To address this, a numerical model for micro-EDM of the superalloy Inconel 718 has been developed using ANSYS Finite Element Analysis software. The developed numerical model is capable of simulating the temperature profile, crater and estimating MRR. The experiments were conducted to validate the numerical results for MRR, which closely matched the simulation results. A parametric study has been conducted numerically and experimentally to evaluate the effects of input variables on the MRR. The developed numerical model benefits researchers, particularly in the aerospace and biomedical sectors that require precise machining of superalloys, by providing a virtual platform for accurately predicting the optimal process variables for achieving the desired MRR of superalloys, minimizing the need for trial-and-error experimentation.</p>

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Material removal rate in micro-EDM of Inconel 718: a numerical and experimental investigation

  • Mayank Choubey,
  • Kalipada Maity,
  • Vivek Srivastava,
  • Pushpinder Kumar

摘要

This work investigates the numerical modeling of micro-EDM operation on superalloy Inconel 718. The developed numerical model characterizes the crater's shape, surface temperature distribution, and material removal rate (MRR). Inconel 718 is a superalloy primarily composed of nickel and chromium, commonly used in harsh environments where components must withstand high temperatures, pressure, and mechanical stress. The nontraditional machining process, micro-EDM, is more promising for machining such superalloys. However, selecting the optimal input process parameters for achieving the desired machining performance in micro-EDM is particularly challenging due to the involvement of multiple input variables, especially when machining complex materials like Inconel 718. To address this, a numerical model for micro-EDM of the superalloy Inconel 718 has been developed using ANSYS Finite Element Analysis software. The developed numerical model is capable of simulating the temperature profile, crater and estimating MRR. The experiments were conducted to validate the numerical results for MRR, which closely matched the simulation results. A parametric study has been conducted numerically and experimentally to evaluate the effects of input variables on the MRR. The developed numerical model benefits researchers, particularly in the aerospace and biomedical sectors that require precise machining of superalloys, by providing a virtual platform for accurately predicting the optimal process variables for achieving the desired MRR of superalloys, minimizing the need for trial-and-error experimentation.