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Feasibility of Using CeO2/Water Dielectrical Nanofluid in Electrical Discharge Machining (EDM)

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Abstract

Dielectrical fluids have substantial impact on the machining performance of electrical discharge machining (EDM). Apposite selection of these fluids enhances the material removal rate (MRR) and microhardness while abating the tool wear rate (TWR) and surface roughness. In the present research, feasibility of using cerium oxide/water (CeO2/water) dielectrical nanofluid in EDM is examined experimentally. A portable EDM has been employed for experimental test, whereby mild steel workpiece and pure copper tool electrode were used. Powder concentration of CeO2/water was varied from 0.0 to 2.0 g/L, while the current, set distance, depth of cut and delay time were kept constant at 0.8 A, 2.0 mm, 0.5 mm and 0.5 s, respectively. Results show that at 0.6 g/L concentration, MRR and machining efficiency is enhanced by 20.04% and 69.68%, while TWR is reduced by 29.25%. Minimum surface roughness is obtained at the concentration of 1.0 g/L with Ra value of 0.22 µm, whereas with distilled water dielectrical fluid this value is 1.06 µm. Scanning electron microscopy images confirm that the best surface quality with the least pores and minute microcracks is obtained at 0.6 g/L concentration. Use of CeO2/water dielectrical nanofluid also improved material hardness significantly. While the microhardness number with distilled water is 1.06 HV, it upraised as high as 1.94 HV at powder concentration of 0.6 g/L.

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Acknowledgements

This research was funded by University of Malaya under UMRG Programme, Grant Number RP039A-15AET.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Centre of Advanced Manufacturing and Material Processing, Faculty of Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia

    Md Moktar Hossain, Mohd Sayuti Bin Ab Karim & Mohd Hamdi Bin Abd Shukor

  2. Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia

    Md Moktar Hossain, Mohd Sayuti Bin Ab Karim, Wong Yew Hoong & Mohd Hamdi Bin Abd Shukor

  3. Department of Mechanical Engineering, Centre of Advanced Materials, Faculty of Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia

    Wong Yew Hoong

  4. Department of Electrical Engineering, Faculty of Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia

    Mohamad Sofian Bin Abu Talip

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  1. Md Moktar Hossain
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Correspondence to Mohd Sayuti Bin Ab Karim.

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Hossain, M.M., Karim, M.S.B.A., Hoong, W.Y. et al. Feasibility of Using CeO2/Water Dielectrical Nanofluid in Electrical Discharge Machining (EDM). Arab J Sci Eng 45, 5435–5445 (2020). https://doi.org/10.1007/s13369-020-04404-x

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