Atomistic investigation of effect of twin boundary on machinability in diamond cutting of nanocrystalline 3C-SiC
The machinability of hard brittle nanocrystalline cubic silicon carbide (3C-SiC) is strongly dependent on internal microstructure and its adapted machining response. Here, we conducted molecular dynamic simulations to explore the machinability of nanotwinned 3C-SiC with a large number of twin bounda...
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| Format: | Article |
| Language: | English |
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AIMS Press
2024-12-01
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| Series: | AIMS Materials Science |
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| Online Access: | https://www.aimspress.com/article/doi/10.3934/matersci.2024056 |
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| _version_ | 1832590278240763904 |
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| author | Liang Zhao Weimian Guan Jiwen Xu Zhiyuan Sun Maoda Zhang Junjie Zhang |
| author_facet | Liang Zhao Weimian Guan Jiwen Xu Zhiyuan Sun Maoda Zhang Junjie Zhang |
| author_sort | Liang Zhao |
| collection | DOAJ |
| description | The machinability of hard brittle nanocrystalline cubic silicon carbide (3C-SiC) is strongly dependent on internal microstructure and its adapted machining response. Here, we conducted molecular dynamic simulations to explore the machinability of nanotwinned 3C-SiC with a large number of twin boundaries in diamond cutting. The effect of the introduction of twin boundaries on the diamond cutting of nanocrystalline 3C-SiC, particular for its contribution to suppressing brittle fracture and improving ductile-mode cutting, was investigated in-depth. Our simulation results revealed that twin boundaries exerted a significant impact on the deformation mechanism and subsequent surface integrity of nanocrystalline 3C-SiC. Specifically, intergranular fracture was significantly suppressed by the introduction of twin boundaries. In addition, various deformation behaviors such as phase transformation, crack propagation, dislocation activity, and twin boundary-associated deformation mechanisms were operated in cutting process of nanotwinned 3C-SiC. Furthermore, the influence of twin boundary spacing on the diamond cutting characteristics of nanotwinned 3C-SiC was also addressed. |
| format | Article |
| id | doaj-art-ad442048d63f47ed96198cfb454e1b14 |
| institution | Kabale University |
| issn | 2372-0484 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | AIMS Press |
| record_format | Article |
| series | AIMS Materials Science |
| spelling | doaj-art-ad442048d63f47ed96198cfb454e1b142025-01-24T01:30:32ZengAIMS PressAIMS Materials Science2372-04842024-12-011161149116410.3934/matersci.2024056Atomistic investigation of effect of twin boundary on machinability in diamond cutting of nanocrystalline 3C-SiCLiang Zhao0Weimian Guan1Jiwen Xu2Zhiyuan Sun3Maoda Zhang4Junjie Zhang5Shenyang Aircraft Industry (Group) Co., Ltd., Shenyang 110850, ChinaShenyang Aircraft Industry (Group) Co., Ltd., Shenyang 110850, ChinaShenyang Aircraft Industry (Group) Co., Ltd., Shenyang 110850, ChinaShenyang Aircraft Industry (Group) Co., Ltd., Shenyang 110850, ChinaShenyang Aircraft Industry (Group) Co., Ltd., Shenyang 110850, ChinaCenter for Precision Engineering, Harbin Institute of Technology, Harbin 150001, ChinaThe machinability of hard brittle nanocrystalline cubic silicon carbide (3C-SiC) is strongly dependent on internal microstructure and its adapted machining response. Here, we conducted molecular dynamic simulations to explore the machinability of nanotwinned 3C-SiC with a large number of twin boundaries in diamond cutting. The effect of the introduction of twin boundaries on the diamond cutting of nanocrystalline 3C-SiC, particular for its contribution to suppressing brittle fracture and improving ductile-mode cutting, was investigated in-depth. Our simulation results revealed that twin boundaries exerted a significant impact on the deformation mechanism and subsequent surface integrity of nanocrystalline 3C-SiC. Specifically, intergranular fracture was significantly suppressed by the introduction of twin boundaries. In addition, various deformation behaviors such as phase transformation, crack propagation, dislocation activity, and twin boundary-associated deformation mechanisms were operated in cutting process of nanotwinned 3C-SiC. Furthermore, the influence of twin boundary spacing on the diamond cutting characteristics of nanotwinned 3C-SiC was also addressed.https://www.aimspress.com/article/doi/10.3934/matersci.2024056nanocrystalline 3c-sicductile machinabilitytwin boundarydiamond cuttingmolecular dynamics simulation |
| spellingShingle | Liang Zhao Weimian Guan Jiwen Xu Zhiyuan Sun Maoda Zhang Junjie Zhang Atomistic investigation of effect of twin boundary on machinability in diamond cutting of nanocrystalline 3C-SiC AIMS Materials Science nanocrystalline 3c-sic ductile machinability twin boundary diamond cutting molecular dynamics simulation |
| title | Atomistic investigation of effect of twin boundary on machinability in diamond cutting of nanocrystalline 3C-SiC |
| title_full | Atomistic investigation of effect of twin boundary on machinability in diamond cutting of nanocrystalline 3C-SiC |
| title_fullStr | Atomistic investigation of effect of twin boundary on machinability in diamond cutting of nanocrystalline 3C-SiC |
| title_full_unstemmed | Atomistic investigation of effect of twin boundary on machinability in diamond cutting of nanocrystalline 3C-SiC |
| title_short | Atomistic investigation of effect of twin boundary on machinability in diamond cutting of nanocrystalline 3C-SiC |
| title_sort | atomistic investigation of effect of twin boundary on machinability in diamond cutting of nanocrystalline 3c sic |
| topic | nanocrystalline 3c-sic ductile machinability twin boundary diamond cutting molecular dynamics simulation |
| url | https://www.aimspress.com/article/doi/10.3934/matersci.2024056 |
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