Nanoindentation study of slip transfer phenomenon at grain boundaries
Nanoindentation was undertaken near grain boundaries to increase understanding of their individual contributions to the material's macroscopic mechanical properties. Prior work with nanoindentation in body-centered cubic (bcc) materials has shown that some grain boundaries produce a "pop-i...
| Main Authors: | , , |
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| Format: | Journal article |
| Language: | English |
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2009
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| _version_ | 1797074944572522496 |
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| author | Britton, T Randman, D Wilkinson, A |
| author_facet | Britton, T Randman, D Wilkinson, A |
| author_sort | Britton, T |
| collection | OXFORD |
| description | Nanoindentation was undertaken near grain boundaries to increase understanding of their individual contributions to the material's macroscopic mechanical properties. Prior work with nanoindentation in body-centered cubic (bcc) materials has shown that some grain boundaries produce a "pop-in" event, an excursion in the load-displacement curve. In the current work, grain boundary associated pop-in events were observed in a Fe-0.01 wt% C polycrystal (bcc), and this is characteristic of high resistance to intergranular slip transfer. Grain boundaries with greater misalignment of slip systems tended to exhibit greater resistance to slip transfer. Grain boundary associated pop-ins were not observed in pure copper (face-centered cubic) or interstitial free steel ∼0.002 wt% C (bcc). Additionally, it was found that cold work of the Fe-0.01 wt% C polycrystal immediately prior to indentation completely suppressed grain boundary associated pop-in events. It is concluded that the grain boundary associated pop-in events are directly linked to interstitials pinning dislocations on or near the boundary. This links well with macroscopic Hall-Petch effect observations. © 2009 Materials Research Society. |
| first_indexed | 2024-03-06T23:43:30Z |
| format | Journal article |
| id | oxford-uuid:70206835-84ac-4bbb-8d87-6d572a36b6b1 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T23:43:30Z |
| publishDate | 2009 |
| record_format | dspace |
| spelling | oxford-uuid:70206835-84ac-4bbb-8d87-6d572a36b6b12022-03-26T19:35:05ZNanoindentation study of slip transfer phenomenon at grain boundariesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:70206835-84ac-4bbb-8d87-6d572a36b6b1EnglishSymplectic Elements at Oxford2009Britton, TRandman, DWilkinson, ANanoindentation was undertaken near grain boundaries to increase understanding of their individual contributions to the material's macroscopic mechanical properties. Prior work with nanoindentation in body-centered cubic (bcc) materials has shown that some grain boundaries produce a "pop-in" event, an excursion in the load-displacement curve. In the current work, grain boundary associated pop-in events were observed in a Fe-0.01 wt% C polycrystal (bcc), and this is characteristic of high resistance to intergranular slip transfer. Grain boundaries with greater misalignment of slip systems tended to exhibit greater resistance to slip transfer. Grain boundary associated pop-ins were not observed in pure copper (face-centered cubic) or interstitial free steel ∼0.002 wt% C (bcc). Additionally, it was found that cold work of the Fe-0.01 wt% C polycrystal immediately prior to indentation completely suppressed grain boundary associated pop-in events. It is concluded that the grain boundary associated pop-in events are directly linked to interstitials pinning dislocations on or near the boundary. This links well with macroscopic Hall-Petch effect observations. © 2009 Materials Research Society. |
| spellingShingle | Britton, T Randman, D Wilkinson, A Nanoindentation study of slip transfer phenomenon at grain boundaries |
| title | Nanoindentation study of slip transfer phenomenon at grain boundaries |
| title_full | Nanoindentation study of slip transfer phenomenon at grain boundaries |
| title_fullStr | Nanoindentation study of slip transfer phenomenon at grain boundaries |
| title_full_unstemmed | Nanoindentation study of slip transfer phenomenon at grain boundaries |
| title_short | Nanoindentation study of slip transfer phenomenon at grain boundaries |
| title_sort | nanoindentation study of slip transfer phenomenon at grain boundaries |
| work_keys_str_mv | AT brittont nanoindentationstudyofsliptransferphenomenonatgrainboundaries AT randmand nanoindentationstudyofsliptransferphenomenonatgrainboundaries AT wilkinsona nanoindentationstudyofsliptransferphenomenonatgrainboundaries |