Subsurface amorphization-induced ultrasmooth and ultrahard surface during the diamond turning of polycrystalline pure copper
Previous simulations indicated that pure metals can be amorphized during diamond turning. However, no pure metal has been successfully amorphized during this procedure to date. Herein, a comprehensive study on the surface formation mechanism was performed by examining the surface finish and subsurfa...
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Elsevier
2025-01-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127524009249 |
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| author | Shuqi Wang Chunlei He Zhanfeng Wang Jiwang Yan |
| author_facet | Shuqi Wang Chunlei He Zhanfeng Wang Jiwang Yan |
| author_sort | Shuqi Wang |
| collection | DOAJ |
| description | Previous simulations indicated that pure metals can be amorphized during diamond turning. However, no pure metal has been successfully amorphized during this procedure to date. Herein, a comprehensive study on the surface formation mechanism was performed by examining the surface finish and subsurface variation characteristics. Polycrystalline pure copper was selected as the working material. In this study, the amorphization phenomenon and lattice structure transformations (from face-centred cubic to hexagonal close-packed and monoclinic structures) of pure copper were observed. The amorphization and phase transformation inside the working material depended on the tool nose radius being large, the cutting edge being sharp, and the feed rate being low. By using a large-nose-radius (10 mm) diamond tool with a sharp cutting edge (10.3 nm) at a low feed rate (0.5 μm/rev), an ultrasmooth and ultrahard surface with a 0.61 nm roughness Sa and 5.0 GPa nanohardness was achieved. Molecular dynamics simulations revealed that the high shear strain was responsible for the amorphization and lattice structure transformation during pure copper diamond turning. The findings of this study were considered critical for generating an amorphous subsurface layer in a pure metal and for achieving a ultrasmooth and ultrahard surface using single-point diamond turning. |
| format | Article |
| id | doaj-art-a031dbfc7d52492a95f51dd05575f3fa |
| institution | Kabale University |
| issn | 0264-1275 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj-art-a031dbfc7d52492a95f51dd05575f3fa2025-01-09T06:12:22ZengElsevierMaterials & Design0264-12752025-01-01249113549Subsurface amorphization-induced ultrasmooth and ultrahard surface during the diamond turning of polycrystalline pure copperShuqi Wang0Chunlei He1Zhanfeng Wang2Jiwang Yan3Tianjin Key Laboratory of the Design and Intelligent Control of the Advanced Mechatronical System, Tianjin University of Technology, Tianjin 300384, ChinaTianjin Key Laboratory of Equipment Design and Manufacturing Technology, Tianjin University, Tianjin 300354, China; Corresponding author.School of Mechanical and Electrical Engineering, Suqian University, Suqian 223800, ChinaDepartment of Mechanical Engineering, Faculty of Science and Technology, Keio University, Kohoku-ku, Yokohama 223-8522, JapanPrevious simulations indicated that pure metals can be amorphized during diamond turning. However, no pure metal has been successfully amorphized during this procedure to date. Herein, a comprehensive study on the surface formation mechanism was performed by examining the surface finish and subsurface variation characteristics. Polycrystalline pure copper was selected as the working material. In this study, the amorphization phenomenon and lattice structure transformations (from face-centred cubic to hexagonal close-packed and monoclinic structures) of pure copper were observed. The amorphization and phase transformation inside the working material depended on the tool nose radius being large, the cutting edge being sharp, and the feed rate being low. By using a large-nose-radius (10 mm) diamond tool with a sharp cutting edge (10.3 nm) at a low feed rate (0.5 μm/rev), an ultrasmooth and ultrahard surface with a 0.61 nm roughness Sa and 5.0 GPa nanohardness was achieved. Molecular dynamics simulations revealed that the high shear strain was responsible for the amorphization and lattice structure transformation during pure copper diamond turning. The findings of this study were considered critical for generating an amorphous subsurface layer in a pure metal and for achieving a ultrasmooth and ultrahard surface using single-point diamond turning.http://www.sciencedirect.com/science/article/pii/S0264127524009249Diamond turningAmorphizationPure copperShear strain |
| spellingShingle | Shuqi Wang Chunlei He Zhanfeng Wang Jiwang Yan Subsurface amorphization-induced ultrasmooth and ultrahard surface during the diamond turning of polycrystalline pure copper Materials & Design Diamond turning Amorphization Pure copper Shear strain |
| title | Subsurface amorphization-induced ultrasmooth and ultrahard surface during the diamond turning of polycrystalline pure copper |
| title_full | Subsurface amorphization-induced ultrasmooth and ultrahard surface during the diamond turning of polycrystalline pure copper |
| title_fullStr | Subsurface amorphization-induced ultrasmooth and ultrahard surface during the diamond turning of polycrystalline pure copper |
| title_full_unstemmed | Subsurface amorphization-induced ultrasmooth and ultrahard surface during the diamond turning of polycrystalline pure copper |
| title_short | Subsurface amorphization-induced ultrasmooth and ultrahard surface during the diamond turning of polycrystalline pure copper |
| title_sort | subsurface amorphization induced ultrasmooth and ultrahard surface during the diamond turning of polycrystalline pure copper |
| topic | Diamond turning Amorphization Pure copper Shear strain |
| url | http://www.sciencedirect.com/science/article/pii/S0264127524009249 |
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