Atomistic study on the nano-scratch mechanism of CoCrFeMnNi high-entropy alloy at different morphology densities
The physical nature of the scratch behavior of CoCrFeMnNi HEA and its deformation mechanism at different morphology densities are investigated by molecular dynamics simulations. The results show that the groove morphology contributes to the reduction of surface plastic deformation and exhibits a fri...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | Materials Research Express |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/2053-1591/acac62 |
| _version_ | 1797746527283707904 |
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| author | Bing Wang Rong Luo Qian Wang Haidong Liu |
| author_facet | Bing Wang Rong Luo Qian Wang Haidong Liu |
| author_sort | Bing Wang |
| collection | DOAJ |
| description | The physical nature of the scratch behavior of CoCrFeMnNi HEA and its deformation mechanism at different morphology densities are investigated by molecular dynamics simulations. The results show that the groove morphology contributes to the reduction of surface plastic deformation and exhibits a friction-reducing effect. As the morphology density decreases, the surface deformation and atom pile-up decrease, and the plastic deformation in the scratch region decreases, resulting in a further enhancement of the friction reduction effect. The increase of scratch depth intensifies the plastic deformation of the specimens, and the average scratch coefficient of friction increases with the increase in scratch depth. The dominant plastic deformation mechanism in the scratch deformation of CoCrFeMnNi HEA with different morphology densities is the slip deformation of Shockley partial dislocations. The MD simulations are verified further by qualitatively comparing them with corresponding experimental observations of CoCrFeMnNi HEA. |
| first_indexed | 2024-03-12T15:39:04Z |
| format | Article |
| id | doaj.art-3e82c921f4a24a39985af6dcfe736f1f |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:39:04Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-3e82c921f4a24a39985af6dcfe736f1f2023-08-09T16:04:46ZengIOP PublishingMaterials Research Express2053-15912023-01-0110101650310.1088/2053-1591/acac62Atomistic study on the nano-scratch mechanism of CoCrFeMnNi high-entropy alloy at different morphology densitiesBing Wang0https://orcid.org/0000-0001-9232-3621Rong Luo1Qian Wang2Haidong Liu3https://orcid.org/0000-0003-2214-6476Key Laboratory of Testing for Manufacturing Process, Ministry of Education, School of Manufacturing Science and Engineering, Southwest University of Science and Technology , Mianyang, Sichuan, 621010, People’s Republic of China; Tianjin Key Laboratory of Composite & Functional Materials, School of Materials Science and Engineering, Tianjin University , Tianjin, 300072, People’s Republic of China; Ningbo Ruifu Industry Group Co., Ltd., Ningbo, Zhejiang, 315000, People’s Republic of ChinaKey Laboratory of Testing for Manufacturing Process, Ministry of Education, School of Manufacturing Science and Engineering, Southwest University of Science and Technology , Mianyang, Sichuan, 621010, People’s Republic of ChinaKey Laboratory of Testing for Manufacturing Process, Ministry of Education, School of Manufacturing Science and Engineering, Southwest University of Science and Technology , Mianyang, Sichuan, 621010, People’s Republic of ChinaKey Laboratory of Testing for Manufacturing Process, Ministry of Education, School of Manufacturing Science and Engineering, Southwest University of Science and Technology , Mianyang, Sichuan, 621010, People’s Republic of China; Tianjin Key Laboratory of Composite & Functional Materials, School of Materials Science and Engineering, Tianjin University , Tianjin, 300072, People’s Republic of China; Ningbo Ruifu Industry Group Co., Ltd., Ningbo, Zhejiang, 315000, People’s Republic of ChinaThe physical nature of the scratch behavior of CoCrFeMnNi HEA and its deformation mechanism at different morphology densities are investigated by molecular dynamics simulations. The results show that the groove morphology contributes to the reduction of surface plastic deformation and exhibits a friction-reducing effect. As the morphology density decreases, the surface deformation and atom pile-up decrease, and the plastic deformation in the scratch region decreases, resulting in a further enhancement of the friction reduction effect. The increase of scratch depth intensifies the plastic deformation of the specimens, and the average scratch coefficient of friction increases with the increase in scratch depth. The dominant plastic deformation mechanism in the scratch deformation of CoCrFeMnNi HEA with different morphology densities is the slip deformation of Shockley partial dislocations. The MD simulations are verified further by qualitatively comparing them with corresponding experimental observations of CoCrFeMnNi HEA.https://doi.org/10.1088/2053-1591/acac62CoCrFeMnNi high-entropy alloymolecular dynamics simulationsnano-scratchmorphology densityscratch depth |
| spellingShingle | Bing Wang Rong Luo Qian Wang Haidong Liu Atomistic study on the nano-scratch mechanism of CoCrFeMnNi high-entropy alloy at different morphology densities Materials Research Express CoCrFeMnNi high-entropy alloy molecular dynamics simulations nano-scratch morphology density scratch depth |
| title | Atomistic study on the nano-scratch mechanism of CoCrFeMnNi high-entropy alloy at different morphology densities |
| title_full | Atomistic study on the nano-scratch mechanism of CoCrFeMnNi high-entropy alloy at different morphology densities |
| title_fullStr | Atomistic study on the nano-scratch mechanism of CoCrFeMnNi high-entropy alloy at different morphology densities |
| title_full_unstemmed | Atomistic study on the nano-scratch mechanism of CoCrFeMnNi high-entropy alloy at different morphology densities |
| title_short | Atomistic study on the nano-scratch mechanism of CoCrFeMnNi high-entropy alloy at different morphology densities |
| title_sort | atomistic study on the nano scratch mechanism of cocrfemnni high entropy alloy at different morphology densities |
| topic | CoCrFeMnNi high-entropy alloy molecular dynamics simulations nano-scratch morphology density scratch depth |
| url | https://doi.org/10.1088/2053-1591/acac62 |
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