Electrometallurgy Today, 2025, №01

2025 №01 (03)

DOI of Article 10.37434/sem2025.01.04

2025 №01 (05)

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"Suchasna Elektrometallurgiya" (Electrometallurgy Today), 2025, #1, 19-25 pages

Study of the effect of electrical discharge cutting on formation of a damaged layer during processing of tungsten single crystals

Yu.O. Nikitenko, V.O. Shapovalov, V.V. Yakusha, O.M. Gnizdylo, D.M. Zhirov

E.O. Paton Electric Welding Institute of the NAS of Ukraine 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: nikyu80@gmail.com

Abstract
The new type of electrical discharge machining without immersion of the processed workpiece is characterized by higher cost-effectiveness, simplified maintenance, and safety. In addition, a molybdenum wire with multiple reversible feed is used as a cutting tool, instead of a consumable brass wire. This study presents the results of experiments on processing tungsten single crystals by varying the technological modes of electrical discharge cutting. The dependences of the effect of the duration of electric discharge pulses and the pause between them on surface morphology, depth of interplane crack formation, and cutting speed were determined. Molybdenum wire with a diameter of 0.18 mm and a tungsten single crystal with a thickness of 15 mm were used as tools and working material in the experiments. 7 Ref., 3 Tabl., 11 Fig.
Keywords: tungsten single crystal, electrical discharge cutting, damaged layer, interplane cracks

Received: 05.06.2024
Received in revised form: 27.06.2024
Accepted: 14.02.2025

References

1. Shpak, A.P., Molodkin, V.B., Nizkova, G.I. et al. (2004). Influence of the broken surface layer on dynamic scattering in crystals with defects. Usp. Fiz. Met., 5, 285-312. https://doi.org/10.15407/ufm.05.03.285
2. Tosun, N., Cogun, C., Tosun, G. (2004) A study on kerf and material removal rate in wire electrical discharge machining based on Taguchi method. J. Materials Proc. Technology, 152, 316-322. https://doi.org/10.1016/j.jmatprotec.2004.04.373
3. Kneubühler, F., Wiessner, M., Wegener, K. (2020) Analysis of WEDM process with respect to wire wear and wire consumption. Procedia CIRP, 95, 313-318. https://doi.org/10.1016/j.procir.2020.03.151
4. Tosun, N. (2003) The effect of the cutting parameters on performance of WEDM. KSME Inter. J., 17(6), 816-824. https://doi.org/10.1007/BF02983395
5. Mouralova, K., Prokes, T., Benes, L., Bednar, J. (2019) The infuence of WEDM parameters setup on the occurrence of defects when machining Hardox 400 steel. Materials, 12, 3758. https://doi.org/10.3390/ma12223758
6. Nikitenko, Yu.O., Shapovalov, V.O., Yakusha, V.V. et al. (2023) 3D technology of growing single-crystal ingots in the form of hollow tungsten cylinders. Suchasna Elektrometal., 2, 34-40 [in Ukrainian]. https://doi.org/10.37434/sem2023.02.05
7. Nikitenko, Y., Shapovalov, V., Yakusha, V. et al. (2024) Features of the structural formation of tungsten single crystals in the shape of hollow rotational bodies. Mat. Sci. Forum, 1113. https://doi.org/10.4028/p-SDyx6A

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