Deformation behavior and mechanical properties of polycrystalline and single crystal alumina during nanoindentation
The nanoscale pop-in phenomena in polycrystalline alpha-Al2O3 and single crystal alpha-Al2O3(0001) were comparatively investigated by nanoindentation with Berkovich indenters. It was found that different radii and loading rates have significant effects on the pop-ins formation, stress distributions...
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| Format: | Journal Article |
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Elsevier
2011
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| Online Access: | http://hdl.handle.net/20.500.11937/47231 |
| _version_ | 1848757777369923584 |
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| author | Mao, W. Shen, Y. Lu, Chungsheng |
| author_facet | Mao, W. Shen, Y. Lu, Chungsheng |
| author_sort | Mao, W. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The nanoscale pop-in phenomena in polycrystalline alpha-Al2O3 and single crystal alpha-Al2O3(0001) were comparatively investigated by nanoindentation with Berkovich indenters. It was found that different radii and loading rates have significant effects on the pop-ins formation, stress distributions and dislocation nucleations. Using the Hertzian contact theory and energetic model approach, the pop-in observations and resolved shear stress analysis are consistent with the explanation that the first pop-in corresponds to the nucleation of homogeneous dislocations when the theoretical shear strenghth is exceeded. |
| first_indexed | 2025-11-14T09:33:29Z |
| format | Journal Article |
| id | curtin-20.500.11937-47231 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:33:29Z |
| publishDate | 2011 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-472312019-02-19T05:35:11Z Deformation behavior and mechanical properties of polycrystalline and single crystal alumina during nanoindentation Mao, W. Shen, Y. Lu, Chungsheng nanoindentation alumina crystalline oxide indentation size effect pop-in events The nanoscale pop-in phenomena in polycrystalline alpha-Al2O3 and single crystal alpha-Al2O3(0001) were comparatively investigated by nanoindentation with Berkovich indenters. It was found that different radii and loading rates have significant effects on the pop-ins formation, stress distributions and dislocation nucleations. Using the Hertzian contact theory and energetic model approach, the pop-in observations and resolved shear stress analysis are consistent with the explanation that the first pop-in corresponds to the nucleation of homogeneous dislocations when the theoretical shear strenghth is exceeded. 2011 Journal Article http://hdl.handle.net/20.500.11937/47231 10.1016/j.scriptamat.2011.03.022 Elsevier fulltext |
| spellingShingle | nanoindentation alumina crystalline oxide indentation size effect pop-in events Mao, W. Shen, Y. Lu, Chungsheng Deformation behavior and mechanical properties of polycrystalline and single crystal alumina during nanoindentation |
| title | Deformation behavior and mechanical properties of polycrystalline and single crystal alumina during nanoindentation |
| title_full | Deformation behavior and mechanical properties of polycrystalline and single crystal alumina during nanoindentation |
| title_fullStr | Deformation behavior and mechanical properties of polycrystalline and single crystal alumina during nanoindentation |
| title_full_unstemmed | Deformation behavior and mechanical properties of polycrystalline and single crystal alumina during nanoindentation |
| title_short | Deformation behavior and mechanical properties of polycrystalline and single crystal alumina during nanoindentation |
| title_sort | deformation behavior and mechanical properties of polycrystalline and single crystal alumina during nanoindentation |
| topic | nanoindentation alumina crystalline oxide indentation size effect pop-in events |
| url | http://hdl.handle.net/20.500.11937/47231 |