Preliminary communication

https://doi.org/10.31803/tg-20240506194710

Enhancement of Powder Mixed Electrical Discharge Machining Performance Using Nano SiO2 Powder Additive

Dunya Adnan Ghulam ; Production Engineering and Metallurgy Dept., University of Technology, Alsina’a Street, 10066 Baghdad, Iraq *
Abbas Fadhil Ibrahim ; Production Engineering and Metallurgy Dept., University of Technology, Alsina’a Street, 10066 Baghdad, Iraq

* Corresponding author.

Abstract

Nanopowder-mixed EDM was employed to machine metals that are challenging to machine by traditional processes. In this study, Inconel 718 was machined by adding nano-SiO2 to a soybean oil dielectric with the use of magnetic field to enhance the process’s functioning. The impact of machining factors (current, pulse on time, SiO2 concentration, and magnetic field) on white layer thickness (WLT), heat-affected zone (HAZ), surface roughness (Ra), material removal rate (MRR), tool wear rate (TWR), and surface crack density (SCD) were studied. The findings demonstrated that adding nano-SiO2 to the insulating fluid improved process’s functioning, whereas the WLT and HAZ were enhanced by 37.68% and 42.16%, respectively. Also, Ra, MRR, and TWR were improved by 9.59%, 50.93%, and 66.44%, respectively, as compared to machining without powder addition. The SEM micrographs revealed that fewer cracks were produced on the workpiece’s surface with 4 g/l of added SiO2, and the SCD improved by 12.81%.

Keywords

Inconel 718; magnetic field assistance; NPMEDM; nano SiO2; white layer thickness

Hrčak ID:

335275

URI

https://hrcak.srce.hr/335275

Publication date:

15.12.2025.

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