Mechanical properties of ion-implanted tungsten-5wt% tantalum
Ion implantation has been used to simulate neutron damage in W-5wt%Ta alloy manufactured by arc melting. Implantations were carried out at damage levels of 0.07, 1.2, 13 and 33 displacements per atom (dpa). The mechanical properties of the ion-implanted layer were investigated by nanoindentation. Th...
| Autors principals: | , , |
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| Format: | Conference item |
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2011
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| _version_ | 1826279827323224064 |
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| author | Armstrong, D Wilkinson, A Roberts, S |
| author_facet | Armstrong, D Wilkinson, A Roberts, S |
| author_sort | Armstrong, D |
| collection | OXFORD |
| description | Ion implantation has been used to simulate neutron damage in W-5wt%Ta alloy manufactured by arc melting. Implantations were carried out at damage levels of 0.07, 1.2, 13 and 33 displacements per atom (dpa). The mechanical properties of the ion-implanted layer were investigated by nanoindentation. The hardness increases rapidly from 7.3 GPa in the unimplanted condition to 8.8 GPa at 0.07 dpa. Above this damage level, the increase in hardness is lower, and the hardness change saturates by 13 dpa. In the initial portion of the load-displacement curves, the indentations in unimplanted material show a large 'initial pop-in' corresponding to the onset of plasticity. This is not seen in the implanted samples at any doses. The change in plasticity has also been studied using the nanoindenter in scanning mode to produce a topographical scan around indentations. In the unimplanted condition there is an extensive pile-up around the indentation. At damage levels of 0.07 and 1.2 dpa the extent and height of pile-up are much less. The reasons for this are under further investigation. © 2011 The Royal Swedish Academy of Sciences. |
| first_indexed | 2024-03-07T00:04:36Z |
| format | Conference item |
| id | oxford-uuid:771f5bc8-c5df-4b73-8301-dc21e5106f6f |
| institution | University of Oxford |
| last_indexed | 2024-03-07T00:04:36Z |
| publishDate | 2011 |
| record_format | dspace |
| spelling | oxford-uuid:771f5bc8-c5df-4b73-8301-dc21e5106f6f2022-03-26T20:21:26ZMechanical properties of ion-implanted tungsten-5wt% tantalumConference itemhttp://purl.org/coar/resource_type/c_5794uuid:771f5bc8-c5df-4b73-8301-dc21e5106f6fSymplectic Elements at Oxford2011Armstrong, DWilkinson, ARoberts, SIon implantation has been used to simulate neutron damage in W-5wt%Ta alloy manufactured by arc melting. Implantations were carried out at damage levels of 0.07, 1.2, 13 and 33 displacements per atom (dpa). The mechanical properties of the ion-implanted layer were investigated by nanoindentation. The hardness increases rapidly from 7.3 GPa in the unimplanted condition to 8.8 GPa at 0.07 dpa. Above this damage level, the increase in hardness is lower, and the hardness change saturates by 13 dpa. In the initial portion of the load-displacement curves, the indentations in unimplanted material show a large 'initial pop-in' corresponding to the onset of plasticity. This is not seen in the implanted samples at any doses. The change in plasticity has also been studied using the nanoindenter in scanning mode to produce a topographical scan around indentations. In the unimplanted condition there is an extensive pile-up around the indentation. At damage levels of 0.07 and 1.2 dpa the extent and height of pile-up are much less. The reasons for this are under further investigation. © 2011 The Royal Swedish Academy of Sciences. |
| spellingShingle | Armstrong, D Wilkinson, A Roberts, S Mechanical properties of ion-implanted tungsten-5wt% tantalum |
| title | Mechanical properties of ion-implanted tungsten-5wt% tantalum |
| title_full | Mechanical properties of ion-implanted tungsten-5wt% tantalum |
| title_fullStr | Mechanical properties of ion-implanted tungsten-5wt% tantalum |
| title_full_unstemmed | Mechanical properties of ion-implanted tungsten-5wt% tantalum |
| title_short | Mechanical properties of ion-implanted tungsten-5wt% tantalum |
| title_sort | mechanical properties of ion implanted tungsten 5wt tantalum |
| work_keys_str_mv | AT armstrongd mechanicalpropertiesofionimplantedtungsten5wttantalum AT wilkinsona mechanicalpropertiesofionimplantedtungsten5wttantalum AT robertss mechanicalpropertiesofionimplantedtungsten5wttantalum |