Effect of microstructure refinement of pure copper on improving the performance of electrodes in electro discharge machining (EDM)
Abstract The paper presents an analysis of the impact of plastic deformation using hydrostatic extrusion (HE) on the structural, mechanical and functional properties of pure copper for use as electrodes in the process of electro discharge machining (EDM). As part of the research, copper was subjecte...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2023-10-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-023-43584-y |
| _version_ | 1797576830319853568 |
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| author | Jacek Skiba Mariusz Kulczyk Sylwia Przybysz-Gloc Monika Skorupska Mariusz Kobus Kamil Nowak |
| author_facet | Jacek Skiba Mariusz Kulczyk Sylwia Przybysz-Gloc Monika Skorupska Mariusz Kobus Kamil Nowak |
| author_sort | Jacek Skiba |
| collection | DOAJ |
| description | Abstract The paper presents an analysis of the impact of plastic deformation using hydrostatic extrusion (HE) on the structural, mechanical and functional properties of pure copper for use as electrodes in the process of electro discharge machining (EDM). As part of the research, copper was subjected to the HE process with the maximum cumulative true strain equal to ɛ cum = 3.89 obtained in 5 stages. The result was, a refinement of the microstructure with the grains elongated in the direction of extrusion, with a cross-sectional size of d 2 = 228 nm. As the obtained material can be potentially used in the process of electro discharge machining, the copper specimens after the HE process were subjected to a comprehensive analysis to determine the mechanical, physical and functional properties of the material. A significant increase in strength (UTS) and yield strength (YS) of the HE-processed copper was obtained, reaching respectively UTS = 464 MPa and YS = 456 MPa at the maximum strain of ɛ = 3.89. Despite the clear strain-induced strengthening of the material, a very high electrical conductivity of not less than 97% was obtained. The electrodes made of copper after HE process have reduced erosion wear while maintaining a comparable or better quality of the machined surface. The best results were obtained for finish machining, where the electrical discharge wear was lower by 60% compared to the electrode made of non-processed copper. In addition, an improvement in the surface quality after the EDM process by 25% was observed when using the HE-processed electrodes. |
| first_indexed | 2024-03-10T21:59:16Z |
| format | Article |
| id | doaj.art-4bd3c2076eee4e369f74c444089e747c |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-03-10T21:59:16Z |
| publishDate | 2023-10-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-4bd3c2076eee4e369f74c444089e747c2023-11-19T13:00:16ZengNature PortfolioScientific Reports2045-23222023-10-0113111210.1038/s41598-023-43584-yEffect of microstructure refinement of pure copper on improving the performance of electrodes in electro discharge machining (EDM)Jacek Skiba0Mariusz Kulczyk1Sylwia Przybysz-Gloc2Monika Skorupska3Mariusz Kobus4Kamil Nowak5Institute of High Pressure Physics, Polish Academy of Sciences (Unipress)Institute of High Pressure Physics, Polish Academy of Sciences (Unipress)Institute of High Pressure Physics, Polish Academy of Sciences (Unipress)Institute of High Pressure Physics, Polish Academy of Sciences (Unipress)Gemet Elżbieta CzerwieniakGemet Elżbieta CzerwieniakAbstract The paper presents an analysis of the impact of plastic deformation using hydrostatic extrusion (HE) on the structural, mechanical and functional properties of pure copper for use as electrodes in the process of electro discharge machining (EDM). As part of the research, copper was subjected to the HE process with the maximum cumulative true strain equal to ɛ cum = 3.89 obtained in 5 stages. The result was, a refinement of the microstructure with the grains elongated in the direction of extrusion, with a cross-sectional size of d 2 = 228 nm. As the obtained material can be potentially used in the process of electro discharge machining, the copper specimens after the HE process were subjected to a comprehensive analysis to determine the mechanical, physical and functional properties of the material. A significant increase in strength (UTS) and yield strength (YS) of the HE-processed copper was obtained, reaching respectively UTS = 464 MPa and YS = 456 MPa at the maximum strain of ɛ = 3.89. Despite the clear strain-induced strengthening of the material, a very high electrical conductivity of not less than 97% was obtained. The electrodes made of copper after HE process have reduced erosion wear while maintaining a comparable or better quality of the machined surface. The best results were obtained for finish machining, where the electrical discharge wear was lower by 60% compared to the electrode made of non-processed copper. In addition, an improvement in the surface quality after the EDM process by 25% was observed when using the HE-processed electrodes.https://doi.org/10.1038/s41598-023-43584-y |
| spellingShingle | Jacek Skiba Mariusz Kulczyk Sylwia Przybysz-Gloc Monika Skorupska Mariusz Kobus Kamil Nowak Effect of microstructure refinement of pure copper on improving the performance of electrodes in electro discharge machining (EDM) Scientific Reports |
| title | Effect of microstructure refinement of pure copper on improving the performance of electrodes in electro discharge machining (EDM) |
| title_full | Effect of microstructure refinement of pure copper on improving the performance of electrodes in electro discharge machining (EDM) |
| title_fullStr | Effect of microstructure refinement of pure copper on improving the performance of electrodes in electro discharge machining (EDM) |
| title_full_unstemmed | Effect of microstructure refinement of pure copper on improving the performance of electrodes in electro discharge machining (EDM) |
| title_short | Effect of microstructure refinement of pure copper on improving the performance of electrodes in electro discharge machining (EDM) |
| title_sort | effect of microstructure refinement of pure copper on improving the performance of electrodes in electro discharge machining edm |
| url | https://doi.org/10.1038/s41598-023-43584-y |
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