Intergranular crack nucleation in polycrystalline alumina
Crack nuclei in pure and Cr-doped aluminas with average grain size between 1.5 μm and 3.6 μm have been studied using digital image correlation of optical images, to observe the interaction between microstructure, residual stress and damage development. Individual intergranular crack nuclei within ar...
| Main Authors: | , |
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| Format: | Journal article |
| Language: | English |
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2010
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| _version_ | 1797068371732201472 |
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| author | Aswad, M Marrow, T |
| author_facet | Aswad, M Marrow, T |
| author_sort | Aswad, M |
| collection | OXFORD |
| description | Crack nuclei in pure and Cr-doped aluminas with average grain size between 1.5 μm and 3.6 μm have been studied using digital image correlation of optical images, to observe the interaction between microstructure, residual stress and damage development. Individual intergranular crack nuclei within areas comprising tens of thousands of grains were studied to measure crack surface lengths and crack opening displacements as a function of load, prior to unstable fracture. Grain orientations in the vicinity of intergranular crack nuclei, and the grain boundary planes, has been characterised by trace analysis and electron backscatter diffraction. This allows estimation of the thermal stresses that were sufficient to crack the grain boundaries. |
| first_indexed | 2024-03-06T22:09:49Z |
| format | Journal article |
| id | oxford-uuid:516c6ee0-f07f-42d3-a243-e85cc66ccb97 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T22:09:49Z |
| publishDate | 2010 |
| record_format | dspace |
| spelling | oxford-uuid:516c6ee0-f07f-42d3-a243-e85cc66ccb972022-03-26T16:19:26ZIntergranular crack nucleation in polycrystalline aluminaJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:516c6ee0-f07f-42d3-a243-e85cc66ccb97EnglishSymplectic Elements at Oxford2010Aswad, MMarrow, TCrack nuclei in pure and Cr-doped aluminas with average grain size between 1.5 μm and 3.6 μm have been studied using digital image correlation of optical images, to observe the interaction between microstructure, residual stress and damage development. Individual intergranular crack nuclei within areas comprising tens of thousands of grains were studied to measure crack surface lengths and crack opening displacements as a function of load, prior to unstable fracture. Grain orientations in the vicinity of intergranular crack nuclei, and the grain boundary planes, has been characterised by trace analysis and electron backscatter diffraction. This allows estimation of the thermal stresses that were sufficient to crack the grain boundaries. |
| spellingShingle | Aswad, M Marrow, T Intergranular crack nucleation in polycrystalline alumina |
| title | Intergranular crack nucleation in polycrystalline alumina |
| title_full | Intergranular crack nucleation in polycrystalline alumina |
| title_fullStr | Intergranular crack nucleation in polycrystalline alumina |
| title_full_unstemmed | Intergranular crack nucleation in polycrystalline alumina |
| title_short | Intergranular crack nucleation in polycrystalline alumina |
| title_sort | intergranular crack nucleation in polycrystalline alumina |
| work_keys_str_mv | AT aswadm intergranularcracknucleationinpolycrystallinealumina AT marrowt intergranularcracknucleationinpolycrystallinealumina |