Study on the microscopic compression deformation mechanism of nanocrystalline single-phase gold platinum alloy
Although the catalytic properties of Au–Pt alloys have received widespread attention, there are a few of relevant studies on their microscopic deformation process. Considering that Au–Pt alloys are noble metals, and the costs of experiments are extremely high. Direct research experiments are extreme...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-11-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423025747 |
| _version_ | 1797301527828758528 |
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| author | Jinsong Niu Rui Hu Xian Luo Zitong Gao Pengtao Li |
| author_facet | Jinsong Niu Rui Hu Xian Luo Zitong Gao Pengtao Li |
| author_sort | Jinsong Niu |
| collection | DOAJ |
| description | Although the catalytic properties of Au–Pt alloys have received widespread attention, there are a few of relevant studies on their microscopic deformation process. Considering that Au–Pt alloys are noble metals, and the costs of experiments are extremely high. Direct research experiments are extremely expensive. So the molecular dynamics method which can directly observe the evolution process of microstructure and analyze the mechanical behavior of each deformation stage of the material was adopted to explore the underlined relationship between the temperature and the compression deformation mechanism. The results show that during the process of compression deformation, lots of atoms in the crystal are converted into boundary atoms, the dislocation multiplication and the grain fragmentation occur. In different temperature intervals, along with the compression deformation, low temperature, medium temperature and high temperature recovery appear. Due to the influence of the dual mechanism of deformation and recovery, the deformation mechanism is different at different temperatures, at low temperature stage is mainly the dislocation multiplication and the grain fragmentation, at middle temperature stage is the combination of the opposite sign dislocation, and at high temperature stage is mainly the merger of the grain. |
| first_indexed | 2024-03-07T23:23:52Z |
| format | Article |
| id | doaj.art-78b963e7578b4e45a3a8316c203eaabf |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-07T23:23:52Z |
| publishDate | 2023-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-78b963e7578b4e45a3a8316c203eaabf2024-02-21T05:26:23ZengElsevierJournal of Materials Research and Technology2238-78542023-11-012730673078Study on the microscopic compression deformation mechanism of nanocrystalline single-phase gold platinum alloyJinsong Niu0Rui Hu1Xian Luo2Zitong Gao3Pengtao Li4State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, PR ChinaState Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, PR China; Shaanxi Provincial Key Laboratory of High Performance Precision Forming Technology and Equipment, Northwestern Polytechnical University, Xi'an, PR China; Corresponding author. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, 710072, PR China.State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, PR ChinaState Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, PR ChinaShaanxi Province Key Laboratory for Electrical Materials and Infiltration Technology, School of Materials Science and Engineering, Xi'an University of Technology, Xi'an, Shaanxi 710048, PR ChinaAlthough the catalytic properties of Au–Pt alloys have received widespread attention, there are a few of relevant studies on their microscopic deformation process. Considering that Au–Pt alloys are noble metals, and the costs of experiments are extremely high. Direct research experiments are extremely expensive. So the molecular dynamics method which can directly observe the evolution process of microstructure and analyze the mechanical behavior of each deformation stage of the material was adopted to explore the underlined relationship between the temperature and the compression deformation mechanism. The results show that during the process of compression deformation, lots of atoms in the crystal are converted into boundary atoms, the dislocation multiplication and the grain fragmentation occur. In different temperature intervals, along with the compression deformation, low temperature, medium temperature and high temperature recovery appear. Due to the influence of the dual mechanism of deformation and recovery, the deformation mechanism is different at different temperatures, at low temperature stage is mainly the dislocation multiplication and the grain fragmentation, at middle temperature stage is the combination of the opposite sign dislocation, and at high temperature stage is mainly the merger of the grain.http://www.sciencedirect.com/science/article/pii/S2238785423025747NanocrystallineSingle-phase Au–Pt alloyMolecular dynamicsCompression deformationRecovery mechanism |
| spellingShingle | Jinsong Niu Rui Hu Xian Luo Zitong Gao Pengtao Li Study on the microscopic compression deformation mechanism of nanocrystalline single-phase gold platinum alloy Journal of Materials Research and Technology Nanocrystalline Single-phase Au–Pt alloy Molecular dynamics Compression deformation Recovery mechanism |
| title | Study on the microscopic compression deformation mechanism of nanocrystalline single-phase gold platinum alloy |
| title_full | Study on the microscopic compression deformation mechanism of nanocrystalline single-phase gold platinum alloy |
| title_fullStr | Study on the microscopic compression deformation mechanism of nanocrystalline single-phase gold platinum alloy |
| title_full_unstemmed | Study on the microscopic compression deformation mechanism of nanocrystalline single-phase gold platinum alloy |
| title_short | Study on the microscopic compression deformation mechanism of nanocrystalline single-phase gold platinum alloy |
| title_sort | study on the microscopic compression deformation mechanism of nanocrystalline single phase gold platinum alloy |
| topic | Nanocrystalline Single-phase Au–Pt alloy Molecular dynamics Compression deformation Recovery mechanism |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423025747 |
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