Dislocation pile-ups in Fe at high temperature
Dislocation 'pile-ups' occur in crystals when a number of similar dislocations, gliding in a common slip plane, are driven by an applied stress towards an obstacle that they cannot overcome. In contrast to dislocation walls, pile-ups give rise to a long-range stress field, and their proper...
| المؤلفون الرئيسيون: | , |
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| التنسيق: | Journal article |
| اللغة: | English |
| منشور في: |
2008
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| _version_ | 1826297558458171392 |
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| author | Fitzgerald, S Dudarev, S |
| author_facet | Fitzgerald, S Dudarev, S |
| author_sort | Fitzgerald, S |
| collection | OXFORD |
| description | Dislocation 'pile-ups' occur in crystals when a number of similar dislocations, gliding in a common slip plane, are driven by an applied stress towards an obstacle that they cannot overcome. In contrast to dislocation walls, pile-ups give rise to a long-range stress field, and their properties strongly influence the plastic behaviour of the crystal as a whole. In this paper, we apply the analytic model of a pile-up (due to Eshelby, Frank and Nabarro) to a cubic crystal. Full anisotropic elasticity is used, and the model is extended to predict the plastic displacement generated by a dislocation source during the formation of a pile-up. The results are applied to Fe close to the temperature of the α-γ phase transition, where the inclusion of anisotropy leads to a strikingly different prediction from that of the isotropic approximation. © 2008 The Royal Society. |
| first_indexed | 2024-03-07T04:33:28Z |
| format | Journal article |
| id | oxford-uuid:cf1f19d9-173f-43c3-a99d-c75d30f107cc |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T04:33:28Z |
| publishDate | 2008 |
| record_format | dspace |
| spelling | oxford-uuid:cf1f19d9-173f-43c3-a99d-c75d30f107cc2022-03-27T07:40:17ZDislocation pile-ups in Fe at high temperatureJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:cf1f19d9-173f-43c3-a99d-c75d30f107ccEnglishSymplectic Elements at Oxford2008Fitzgerald, SDudarev, SDislocation 'pile-ups' occur in crystals when a number of similar dislocations, gliding in a common slip plane, are driven by an applied stress towards an obstacle that they cannot overcome. In contrast to dislocation walls, pile-ups give rise to a long-range stress field, and their properties strongly influence the plastic behaviour of the crystal as a whole. In this paper, we apply the analytic model of a pile-up (due to Eshelby, Frank and Nabarro) to a cubic crystal. Full anisotropic elasticity is used, and the model is extended to predict the plastic displacement generated by a dislocation source during the formation of a pile-up. The results are applied to Fe close to the temperature of the α-γ phase transition, where the inclusion of anisotropy leads to a strikingly different prediction from that of the isotropic approximation. © 2008 The Royal Society. |
| spellingShingle | Fitzgerald, S Dudarev, S Dislocation pile-ups in Fe at high temperature |
| title | Dislocation pile-ups in Fe at high temperature |
| title_full | Dislocation pile-ups in Fe at high temperature |
| title_fullStr | Dislocation pile-ups in Fe at high temperature |
| title_full_unstemmed | Dislocation pile-ups in Fe at high temperature |
| title_short | Dislocation pile-ups in Fe at high temperature |
| title_sort | dislocation pile ups in fe at high temperature |
| work_keys_str_mv | AT fitzgeralds dislocationpileupsinfeathightemperature AT dudarevs dislocationpileupsinfeathightemperature |