Sub-Microstructure of Surface and Subsurface Layers after Electrical Discharge Machining Structural Materials in Water
The material removal mechanism, submicrostructure of surface and subsurface layers, nanotransformations occurred in surface and subsurface layers during electrical discharge machining two structural materials such as anti-corrosion X10CrNiTi18-10 (12kH18N10T) steel of austenite class and 2024 (D16)...
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MDPI AG
2021-06-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/11/7/1040 |
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| author | Sergey N. Grigoriev Marina A. Volosova Anna A. Okunkova Sergey V. Fedorov Khaled Hamdy Pavel A. Podrabinnik |
| author_facet | Sergey N. Grigoriev Marina A. Volosova Anna A. Okunkova Sergey V. Fedorov Khaled Hamdy Pavel A. Podrabinnik |
| author_sort | Sergey N. Grigoriev |
| collection | DOAJ |
| description | The material removal mechanism, submicrostructure of surface and subsurface layers, nanotransformations occurred in surface and subsurface layers during electrical discharge machining two structural materials such as anti-corrosion X10CrNiTi18-10 (12kH18N10T) steel of austenite class and 2024 (D16) duralumin in a deionized water medium were researched. The machining was conducted using a brass tool of 0.25 mm in diameter. The measured discharge gap is 45–60 µm for X10CrNiTi18-10 (12kH18N10T) steel and 105–120 µm for 2024 (D16) duralumin. Surface roughness parameters are arithmetic mean deviation (<i>R<sub>a</sub></i>) of 4.61 µm, 10-point height (<i>R<sub>z</sub></i>) of 28.73 µm, maximum peak-to-valley height (<i>R<sub>tm</sub></i>) of 29.50 µm, mean spacing between peaks (<i>S<sub>m</sub></i>) of 18.0 µm for steel; <i>R<sub>a</sub></i> of 5.41 µm, <i>R<sub>z</sub></i> of 35.29 µm, <i>R<sub>tm</sub></i> of 43.17 µm, <i>S<sub>m</sub></i> of 30.0 µm for duralumin. The recast layer with adsorbed components of the wire tool electrode and carbides was observed up to the depth of 4–6 µm for steel and 2.5–4 µm for duralumin. The Levenberg–Marquardt algorithm was used to mathematically interpolate the dependence of the interelectrode gap on the electrical resistance of the material. The observed microstructures provide grounding on the nature of electrical wear and nanomodification of the obtained surfaces. |
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| id | doaj.art-b618051ef03b421086505fc7a65f8788 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T09:58:02Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-b618051ef03b421086505fc7a65f87882023-11-22T02:10:58ZengMDPI AGMetals2075-47012021-06-01117104010.3390/met11071040Sub-Microstructure of Surface and Subsurface Layers after Electrical Discharge Machining Structural Materials in WaterSergey N. Grigoriev0Marina A. Volosova1Anna A. Okunkova2Sergey V. Fedorov3Khaled Hamdy4Pavel A. Podrabinnik5Department of High-Efficiency Processing Technologies, Moscow State University of Technology “STANKIN”, Vadkovsky per. 1, 127055 Moscow, RussiaDepartment of High-Efficiency Processing Technologies, Moscow State University of Technology “STANKIN”, Vadkovsky per. 1, 127055 Moscow, RussiaDepartment of High-Efficiency Processing Technologies, Moscow State University of Technology “STANKIN”, Vadkovsky per. 1, 127055 Moscow, RussiaDepartment of High-Efficiency Processing Technologies, Moscow State University of Technology “STANKIN”, Vadkovsky per. 1, 127055 Moscow, RussiaDepartment of High-Efficiency Processing Technologies, Moscow State University of Technology “STANKIN”, Vadkovsky per. 1, 127055 Moscow, RussiaDepartment of High-Efficiency Processing Technologies, Moscow State University of Technology “STANKIN”, Vadkovsky per. 1, 127055 Moscow, RussiaThe material removal mechanism, submicrostructure of surface and subsurface layers, nanotransformations occurred in surface and subsurface layers during electrical discharge machining two structural materials such as anti-corrosion X10CrNiTi18-10 (12kH18N10T) steel of austenite class and 2024 (D16) duralumin in a deionized water medium were researched. The machining was conducted using a brass tool of 0.25 mm in diameter. The measured discharge gap is 45–60 µm for X10CrNiTi18-10 (12kH18N10T) steel and 105–120 µm for 2024 (D16) duralumin. Surface roughness parameters are arithmetic mean deviation (<i>R<sub>a</sub></i>) of 4.61 µm, 10-point height (<i>R<sub>z</sub></i>) of 28.73 µm, maximum peak-to-valley height (<i>R<sub>tm</sub></i>) of 29.50 µm, mean spacing between peaks (<i>S<sub>m</sub></i>) of 18.0 µm for steel; <i>R<sub>a</sub></i> of 5.41 µm, <i>R<sub>z</sub></i> of 35.29 µm, <i>R<sub>tm</sub></i> of 43.17 µm, <i>S<sub>m</sub></i> of 30.0 µm for duralumin. The recast layer with adsorbed components of the wire tool electrode and carbides was observed up to the depth of 4–6 µm for steel and 2.5–4 µm for duralumin. The Levenberg–Marquardt algorithm was used to mathematically interpolate the dependence of the interelectrode gap on the electrical resistance of the material. The observed microstructures provide grounding on the nature of electrical wear and nanomodification of the obtained surfaces.https://www.mdpi.com/2075-4701/11/7/1040aluminum alloyelectrical erosionerosion weareutecticsinterelectrode gapLevenberg–Marquardt algorithm |
| spellingShingle | Sergey N. Grigoriev Marina A. Volosova Anna A. Okunkova Sergey V. Fedorov Khaled Hamdy Pavel A. Podrabinnik Sub-Microstructure of Surface and Subsurface Layers after Electrical Discharge Machining Structural Materials in Water Metals aluminum alloy electrical erosion erosion wear eutectics interelectrode gap Levenberg–Marquardt algorithm |
| title | Sub-Microstructure of Surface and Subsurface Layers after Electrical Discharge Machining Structural Materials in Water |
| title_full | Sub-Microstructure of Surface and Subsurface Layers after Electrical Discharge Machining Structural Materials in Water |
| title_fullStr | Sub-Microstructure of Surface and Subsurface Layers after Electrical Discharge Machining Structural Materials in Water |
| title_full_unstemmed | Sub-Microstructure of Surface and Subsurface Layers after Electrical Discharge Machining Structural Materials in Water |
| title_short | Sub-Microstructure of Surface and Subsurface Layers after Electrical Discharge Machining Structural Materials in Water |
| title_sort | sub microstructure of surface and subsurface layers after electrical discharge machining structural materials in water |
| topic | aluminum alloy electrical erosion erosion wear eutectics interelectrode gap Levenberg–Marquardt algorithm |
| url | https://www.mdpi.com/2075-4701/11/7/1040 |
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