High temperature indentation of helium-implanted tungsten
Nanoindentation has been performed on tungsten, unimplanted and helium-implanted to ~600. appm, at temperatures up to 750. °C. The hardening effect of the damage was 0.90. GPa at 50. °C, but is negligible above 450. °C. The hardness value at a given temperature did not change on re-testing after hea...
| Main Authors: | , , |
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| Format: | Journal article |
| Language: | English |
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Elsevier
2015
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| _version_ | 1826264770505867264 |
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| author | Gibson, J Roberts, S Armstrong, D |
| author_facet | Gibson, J Roberts, S Armstrong, D |
| author_sort | Gibson, J |
| collection | OXFORD |
| description | Nanoindentation has been performed on tungsten, unimplanted and helium-implanted to ~600. appm, at temperatures up to 750. °C. The hardening effect of the damage was 0.90. GPa at 50. °C, but is negligible above 450. °C. The hardness value at a given temperature did not change on re-testing after heating to 750. °C. This suggests that the helium is trapped in small vacancy complexes that are stable to at least 750. °C, but which can be bypassed due to increased dislocation mobility (cross slip or climb) above 450. °C. |
| first_indexed | 2024-03-06T20:13:11Z |
| format | Journal article |
| id | oxford-uuid:2b473249-f887-43ba-9254-cb4dd08017dd |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T20:13:11Z |
| publishDate | 2015 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | oxford-uuid:2b473249-f887-43ba-9254-cb4dd08017dd2022-03-26T12:29:57ZHigh temperature indentation of helium-implanted tungstenJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:2b473249-f887-43ba-9254-cb4dd08017ddEnglishSymplectic Elements at OxfordElsevier2015Gibson, JRoberts, SArmstrong, DNanoindentation has been performed on tungsten, unimplanted and helium-implanted to ~600. appm, at temperatures up to 750. °C. The hardening effect of the damage was 0.90. GPa at 50. °C, but is negligible above 450. °C. The hardness value at a given temperature did not change on re-testing after heating to 750. °C. This suggests that the helium is trapped in small vacancy complexes that are stable to at least 750. °C, but which can be bypassed due to increased dislocation mobility (cross slip or climb) above 450. °C. |
| spellingShingle | Gibson, J Roberts, S Armstrong, D High temperature indentation of helium-implanted tungsten |
| title | High temperature indentation of helium-implanted tungsten |
| title_full | High temperature indentation of helium-implanted tungsten |
| title_fullStr | High temperature indentation of helium-implanted tungsten |
| title_full_unstemmed | High temperature indentation of helium-implanted tungsten |
| title_short | High temperature indentation of helium-implanted tungsten |
| title_sort | high temperature indentation of helium implanted tungsten |
| work_keys_str_mv | AT gibsonj hightemperatureindentationofheliumimplantedtungsten AT robertss hightemperatureindentationofheliumimplantedtungsten AT armstrongd hightemperatureindentationofheliumimplantedtungsten |