Effects of sequential tungsten and helium ion implantation on nano-indentation hardness of tungsten
To simulate neutron and helium damage in a fusion reactor first wall sequential self-ion implantation up to 13 dpa followed by helium-ion implantation up to 3000 appm was performed to produce damaged layers of ∼2 μm depth in pure tungsten. The hardness of these layers was measured using nanoindentat...
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| Format: | Journal article |
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AIP Publishing
2013
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| _version_ | 1797058405285756928 |
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| author | Armstrong, D Edmondson, P Roberts, S |
| author_facet | Armstrong, D Edmondson, P Roberts, S |
| author_sort | Armstrong, D |
| collection | OXFORD |
| description | To simulate neutron and helium damage in a fusion reactor first wall sequential self-ion implantation up to 13 dpa followed by helium-ion implantation up to 3000 appm was performed to produce damaged layers of ∼2 μm depth in pure tungsten. The hardness of these layers was measured using nanoindentation and was studied using transmission electron microscopy. Substantial hardness increases were seen in helium implanted regions, with smaller hardness increases in regions which had already been self-ion implanted, thus, containing pre-existing dislocation loops. This suggests that, for the same helium content, helium trapped in distributed vacancies gives stronger hardening than helium trapped in vacancies condensed into dislocation loops. |
| first_indexed | 2024-03-06T19:50:04Z |
| format | Journal article |
| id | oxford-uuid:23ab7cb5-013f-4095-bee6-d14b5dca7ee4 |
| institution | University of Oxford |
| last_indexed | 2024-03-06T19:50:04Z |
| publishDate | 2013 |
| publisher | AIP Publishing |
| record_format | dspace |
| spelling | oxford-uuid:23ab7cb5-013f-4095-bee6-d14b5dca7ee42022-03-26T11:45:32ZEffects of sequential tungsten and helium ion implantation on nano-indentation hardness of tungstenJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:23ab7cb5-013f-4095-bee6-d14b5dca7ee4Symplectic Elements at OxfordAIP Publishing2013Armstrong, DEdmondson, PRoberts, STo simulate neutron and helium damage in a fusion reactor first wall sequential self-ion implantation up to 13 dpa followed by helium-ion implantation up to 3000 appm was performed to produce damaged layers of ∼2 μm depth in pure tungsten. The hardness of these layers was measured using nanoindentation and was studied using transmission electron microscopy. Substantial hardness increases were seen in helium implanted regions, with smaller hardness increases in regions which had already been self-ion implanted, thus, containing pre-existing dislocation loops. This suggests that, for the same helium content, helium trapped in distributed vacancies gives stronger hardening than helium trapped in vacancies condensed into dislocation loops. |
| spellingShingle | Armstrong, D Edmondson, P Roberts, S Effects of sequential tungsten and helium ion implantation on nano-indentation hardness of tungsten |
| title | Effects of sequential tungsten and helium ion implantation on nano-indentation hardness of tungsten |
| title_full | Effects of sequential tungsten and helium ion implantation on nano-indentation hardness of tungsten |
| title_fullStr | Effects of sequential tungsten and helium ion implantation on nano-indentation hardness of tungsten |
| title_full_unstemmed | Effects of sequential tungsten and helium ion implantation on nano-indentation hardness of tungsten |
| title_short | Effects of sequential tungsten and helium ion implantation on nano-indentation hardness of tungsten |
| title_sort | effects of sequential tungsten and helium ion implantation on nano indentation hardness of tungsten |
| work_keys_str_mv | AT armstrongd effectsofsequentialtungstenandheliumionimplantationonnanoindentationhardnessoftungsten AT edmondsonp effectsofsequentialtungstenandheliumionimplantationonnanoindentationhardnessoftungsten AT robertss effectsofsequentialtungstenandheliumionimplantationonnanoindentationhardnessoftungsten |