An Atom Probe Tomography study of site preference and partitioning in a nickel-based superalloy
Atom Probe Tomography (APT) has been utilised for an in-depth examination of the commercial polycrystalline Ni-based superalloy RR1000, assessing compositions of the primary, secondary and tertiary γ’ phases. Clear differences in the phase chemistries are noted, part...
| Main Authors: | , , , , , , , |
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| Format: | Journal article |
| Published: |
Elsevier
2016
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| _version_ | 1826264261005934592 |
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| author | Bagot, P Douglas, J Pedrazzini, S Crudden, D Martin, T Moody, M Hardy, M Reed, R |
| author_facet | Bagot, P Douglas, J Pedrazzini, S Crudden, D Martin, T Moody, M Hardy, M Reed, R |
| author_sort | Bagot, P |
| collection | OXFORD |
| description | Atom Probe Tomography (APT) has been utilised for an in-depth examination of the commercial polycrystalline Ni-based superalloy RR1000, assessing compositions of the primary, secondary and tertiary γ’ phases. Clear differences in the phase chemistries are noted, particularly for the tertiary γ’ to which much of the alloy strength is attributed. Trace amounts of Hf are found to segregate strongly to the primary and secondary γ’ phases, but also exhibit an extended diffusion profile across the γ-γ’ interface up to 80 nm wide. Ti, Al and Mo demonstrate similar, yet not as pronounced diffusion profiles, indicating assumed phase chemistries may not be representative of those regions adjacent to the γ-γ’ interface. Within γ’, unique element site-occupancy preferences for this alloy were identified. Finally, the grain boundary chemistry across a γ-γ interface and that of an intragranular boride were analysed, identifying the latter as a mixed M5B3 boride rich in Mo and Cr. These demonstrate further the depth of information on Ni-alloys accessible by APT, while the overall implications of results in comparison with other in-service/model alloys are also discussed. |
| first_indexed | 2024-03-06T20:04:54Z |
| format | Journal article |
| id | oxford-uuid:2896b224-1485-42f5-ba7f-8281508e1a55 |
| institution | University of Oxford |
| last_indexed | 2024-03-06T20:04:54Z |
| publishDate | 2016 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | oxford-uuid:2896b224-1485-42f5-ba7f-8281508e1a552022-03-26T12:13:51ZAn Atom Probe Tomography study of site preference and partitioning in a nickel-based superalloyJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:2896b224-1485-42f5-ba7f-8281508e1a55Symplectic Elements at OxfordElsevier2016Bagot, PDouglas, JPedrazzini, SCrudden, DMartin, TMoody, MHardy, MReed, RAtom Probe Tomography (APT) has been utilised for an in-depth examination of the commercial polycrystalline Ni-based superalloy RR1000, assessing compositions of the primary, secondary and tertiary γ’ phases. Clear differences in the phase chemistries are noted, particularly for the tertiary γ’ to which much of the alloy strength is attributed. Trace amounts of Hf are found to segregate strongly to the primary and secondary γ’ phases, but also exhibit an extended diffusion profile across the γ-γ’ interface up to 80 nm wide. Ti, Al and Mo demonstrate similar, yet not as pronounced diffusion profiles, indicating assumed phase chemistries may not be representative of those regions adjacent to the γ-γ’ interface. Within γ’, unique element site-occupancy preferences for this alloy were identified. Finally, the grain boundary chemistry across a γ-γ interface and that of an intragranular boride were analysed, identifying the latter as a mixed M5B3 boride rich in Mo and Cr. These demonstrate further the depth of information on Ni-alloys accessible by APT, while the overall implications of results in comparison with other in-service/model alloys are also discussed. |
| spellingShingle | Bagot, P Douglas, J Pedrazzini, S Crudden, D Martin, T Moody, M Hardy, M Reed, R An Atom Probe Tomography study of site preference and partitioning in a nickel-based superalloy |
| title | An Atom Probe Tomography study of site preference and partitioning in a nickel-based superalloy |
| title_full | An Atom Probe Tomography study of site preference and partitioning in a nickel-based superalloy |
| title_fullStr | An Atom Probe Tomography study of site preference and partitioning in a nickel-based superalloy |
| title_full_unstemmed | An Atom Probe Tomography study of site preference and partitioning in a nickel-based superalloy |
| title_short | An Atom Probe Tomography study of site preference and partitioning in a nickel-based superalloy |
| title_sort | atom probe tomography study of site preference and partitioning in a nickel based superalloy |
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