Atomistic processes of diffusion-induced unusual compression fracture in metallic nanocrystals
Local thickening, resulting from displacive or diffusive mechanisms individually, is frequently observed in nanoscale metals during compression. However, it is not fully understood how a coupled displacive-diffusive mechanism would mediate the compressive deformation of metallic nanocrystal. Here, b...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2022-12-01
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| Series: | Materials Research Letters |
| Subjects: | |
| Online Access: | https://www.tandfonline.com/doi/10.1080/21663831.2022.2108349 |
| _version_ | 1798033425723031552 |
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| author | Sixue Zheng Xiang Wang Susheng Tan Guofeng Wang Scott X. Mao |
| author_facet | Sixue Zheng Xiang Wang Susheng Tan Guofeng Wang Scott X. Mao |
| author_sort | Sixue Zheng |
| collection | DOAJ |
| description | Local thickening, resulting from displacive or diffusive mechanisms individually, is frequently observed in nanoscale metals during compression. However, it is not fully understood how a coupled displacive-diffusive mechanism would mediate the compressive deformation of metallic nanocrystal. Here, by conducting in situ atomic-scale compression tests, we find that, instead of local thickening commonly reported thus far, abnormal thinning events consecutively occur in silver nanocrystals, where preexisting dislocations and crystal slip serve as stimuli to activate surface atom diffusion. Below a critical width, tensile-fracture-like failure occurs in the silver nanocrystals. This work sheds light on atomic-scale diffusion-mediated compressive deformation of metallic nanocrystal. |
| first_indexed | 2024-04-11T20:30:17Z |
| format | Article |
| id | doaj.art-54c006e3fb854ba8bbdd6b6d17d43703 |
| institution | Directory Open Access Journal |
| issn | 2166-3831 |
| language | English |
| last_indexed | 2024-04-11T20:30:17Z |
| publishDate | 2022-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Materials Research Letters |
| spelling | doaj.art-54c006e3fb854ba8bbdd6b6d17d437032022-12-22T04:04:31ZengTaylor & Francis GroupMaterials Research Letters2166-38312022-12-01101280581210.1080/21663831.2022.2108349Atomistic processes of diffusion-induced unusual compression fracture in metallic nanocrystalsSixue Zheng0Xiang Wang1Susheng Tan2Guofeng Wang3Scott X. Mao4Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, PA, USADepartment of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, PA, USAPetersen Institute of Nanoscience and Engineering, University of Pittsburgh, Pittsburgh, PA, USADepartment of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, PA, USADepartment of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, PA, USALocal thickening, resulting from displacive or diffusive mechanisms individually, is frequently observed in nanoscale metals during compression. However, it is not fully understood how a coupled displacive-diffusive mechanism would mediate the compressive deformation of metallic nanocrystal. Here, by conducting in situ atomic-scale compression tests, we find that, instead of local thickening commonly reported thus far, abnormal thinning events consecutively occur in silver nanocrystals, where preexisting dislocations and crystal slip serve as stimuli to activate surface atom diffusion. Below a critical width, tensile-fracture-like failure occurs in the silver nanocrystals. This work sheds light on atomic-scale diffusion-mediated compressive deformation of metallic nanocrystal.https://www.tandfonline.com/doi/10.1080/21663831.2022.2108349In situ atomic-scalesurface atom diffusiondislocationcompression fracturemetallic nanocrystals |
| spellingShingle | Sixue Zheng Xiang Wang Susheng Tan Guofeng Wang Scott X. Mao Atomistic processes of diffusion-induced unusual compression fracture in metallic nanocrystals Materials Research Letters In situ atomic-scale surface atom diffusion dislocation compression fracture metallic nanocrystals |
| title | Atomistic processes of diffusion-induced unusual compression fracture in metallic nanocrystals |
| title_full | Atomistic processes of diffusion-induced unusual compression fracture in metallic nanocrystals |
| title_fullStr | Atomistic processes of diffusion-induced unusual compression fracture in metallic nanocrystals |
| title_full_unstemmed | Atomistic processes of diffusion-induced unusual compression fracture in metallic nanocrystals |
| title_short | Atomistic processes of diffusion-induced unusual compression fracture in metallic nanocrystals |
| title_sort | atomistic processes of diffusion induced unusual compression fracture in metallic nanocrystals |
| topic | In situ atomic-scale surface atom diffusion dislocation compression fracture metallic nanocrystals |
| url | https://www.tandfonline.com/doi/10.1080/21663831.2022.2108349 |
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