In Situ Scanning Transmission Electron Microscopy Observations of Fracture at the Atomic Scale
© 2020 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to...
| Main Authors: | , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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American Physical Society (APS)
2021
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| Online Access: | https://hdl.handle.net/1721.1/136038 |
| _version_ | 1826205541501763584 |
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| author | Huang, Lingli Zheng, Fangyuan Deng, Qingming Thi, Quoc Huy Wong, Lok Wing Cai, Yuan Wang, Ning Lee, Chun-Sing Lau, Shu Ping Chhowalla, Manish Li, Ju Ly, Thuc Hue Zhao, Jiong |
| author_facet | Huang, Lingli Zheng, Fangyuan Deng, Qingming Thi, Quoc Huy Wong, Lok Wing Cai, Yuan Wang, Ning Lee, Chun-Sing Lau, Shu Ping Chhowalla, Manish Li, Ju Ly, Thuc Hue Zhao, Jiong |
| author_sort | Huang, Lingli |
| collection | MIT |
| description | © 2020 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. The formation, propagation, and structure of nanoscale cracks determine the failure mechanics of engineered materials. Herein, we have captured, with atomic resolution and in real time, unit cell-by-unit cell lattice-trapped cracking in two-dimensional (2D) rhenium disulfide (ReS2) using in situ aberration corrected scanning transmission electron microscopy (STEM). Our real time observations of atomic configurations and corresponding strain fields in propagating cracks directly reveal the atomistic fracture mechanisms. The entirely brittle fracture with non-blunted crack tips as well as perfect healing of cracks have been observed. The mode I fracture toughness of 2D ReS2 is measured. Our experiments have bridged the linear elastic deformation zone and the ultimate nm-sized nonlinear deformation zone inside the crack tip. The dynamics of fracture has been explained by the atomic lattice trapping model. The direct visualization on the strain field in the ongoing crack tips and the gained insights of discrete bond breaking or healing in cracks will facilitate deeper insights into how atoms are able to withstand exceptionally large strains at the crack tips. |
| first_indexed | 2024-09-23T13:14:47Z |
| format | Article |
| id | mit-1721.1/136038 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T13:14:47Z |
| publishDate | 2021 |
| publisher | American Physical Society (APS) |
| record_format | dspace |
| spelling | mit-1721.1/1360382021-10-28T03:55:07Z In Situ Scanning Transmission Electron Microscopy Observations of Fracture at the Atomic Scale Huang, Lingli Zheng, Fangyuan Deng, Qingming Thi, Quoc Huy Wong, Lok Wing Cai, Yuan Wang, Ning Lee, Chun-Sing Lau, Shu Ping Chhowalla, Manish Li, Ju Ly, Thuc Hue Zhao, Jiong © 2020 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. The formation, propagation, and structure of nanoscale cracks determine the failure mechanics of engineered materials. Herein, we have captured, with atomic resolution and in real time, unit cell-by-unit cell lattice-trapped cracking in two-dimensional (2D) rhenium disulfide (ReS2) using in situ aberration corrected scanning transmission electron microscopy (STEM). Our real time observations of atomic configurations and corresponding strain fields in propagating cracks directly reveal the atomistic fracture mechanisms. The entirely brittle fracture with non-blunted crack tips as well as perfect healing of cracks have been observed. The mode I fracture toughness of 2D ReS2 is measured. Our experiments have bridged the linear elastic deformation zone and the ultimate nm-sized nonlinear deformation zone inside the crack tip. The dynamics of fracture has been explained by the atomic lattice trapping model. The direct visualization on the strain field in the ongoing crack tips and the gained insights of discrete bond breaking or healing in cracks will facilitate deeper insights into how atoms are able to withstand exceptionally large strains at the crack tips. 2021-10-27T20:30:31Z 2021-10-27T20:30:31Z 2020 2021-08-10T16:55:14Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/136038 en 10.1103/PhysRevLett.125.246102 Physical Review Letters Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/ application/pdf American Physical Society (APS) APS |
| spellingShingle | Huang, Lingli Zheng, Fangyuan Deng, Qingming Thi, Quoc Huy Wong, Lok Wing Cai, Yuan Wang, Ning Lee, Chun-Sing Lau, Shu Ping Chhowalla, Manish Li, Ju Ly, Thuc Hue Zhao, Jiong In Situ Scanning Transmission Electron Microscopy Observations of Fracture at the Atomic Scale |
| title | In Situ Scanning Transmission Electron Microscopy Observations of Fracture at the Atomic Scale |
| title_full | In Situ Scanning Transmission Electron Microscopy Observations of Fracture at the Atomic Scale |
| title_fullStr | In Situ Scanning Transmission Electron Microscopy Observations of Fracture at the Atomic Scale |
| title_full_unstemmed | In Situ Scanning Transmission Electron Microscopy Observations of Fracture at the Atomic Scale |
| title_short | In Situ Scanning Transmission Electron Microscopy Observations of Fracture at the Atomic Scale |
| title_sort | in situ scanning transmission electron microscopy observations of fracture at the atomic scale |
| url | https://hdl.handle.net/1721.1/136038 |
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