Grain growth in spray-formed Ni superalloys
The grain size of two commercial spray-formed superalloys, UDIMET 720 and MAR-M-002, has been investigated as a function of heat treatment time and temperature, ranging from the fully solid region to 0.78 fraction solid in the solid-plus-liquid region. UDIMET 720 has a γ′ solvus temperature below th...
| Váldodahkkit: | , , , |
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| Materiálatiipa: | Journal article |
| Giella: | English |
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Plenum Publ Corp
1995
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| _version_ | 1826290999176986624 |
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| author | Underhill, R Grant, P Bryant, D Cantor, B |
| author_facet | Underhill, R Grant, P Bryant, D Cantor, B |
| author_sort | Underhill, R |
| collection | OXFORD |
| description | The grain size of two commercial spray-formed superalloys, UDIMET 720 and MAR-M-002, has been investigated as a function of heat treatment time and temperature, ranging from the fully solid region to 0.78 fraction solid in the solid-plus-liquid region. UDIMET 720 has a γ′ solvus temperature below the solidus temperature and shows virtually no increase in grain size when heat treated below this temperature. When UDIMET 720 and MAR-M-002 are heat treated in the solid-plus-liquid region, the grain size increases rapidly initially and then either stabilizes or continues to increase but at a slower rate. This is explained in terms of (a) the resolidification of nonequilibrium librium liquid present during the early stages of heat treatment and (b) the presence of carbide and other phases which pin the grain boundaries. Grain size data fit slightly better to cubic rather than parabolic kinetics, indicating an Ostwald ripening-type mechanism. |
| first_indexed | 2024-03-07T02:52:46Z |
| format | Journal article |
| id | oxford-uuid:ae3f9cde-8236-4539-91d2-cfefa9e71dd6 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T02:52:46Z |
| publishDate | 1995 |
| publisher | Plenum Publ Corp |
| record_format | dspace |
| spelling | oxford-uuid:ae3f9cde-8236-4539-91d2-cfefa9e71dd62022-03-27T03:41:12ZGrain growth in spray-formed Ni superalloysJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:ae3f9cde-8236-4539-91d2-cfefa9e71dd6EnglishSymplectic Elements at OxfordPlenum Publ Corp1995Underhill, RGrant, PBryant, DCantor, BThe grain size of two commercial spray-formed superalloys, UDIMET 720 and MAR-M-002, has been investigated as a function of heat treatment time and temperature, ranging from the fully solid region to 0.78 fraction solid in the solid-plus-liquid region. UDIMET 720 has a γ′ solvus temperature below the solidus temperature and shows virtually no increase in grain size when heat treated below this temperature. When UDIMET 720 and MAR-M-002 are heat treated in the solid-plus-liquid region, the grain size increases rapidly initially and then either stabilizes or continues to increase but at a slower rate. This is explained in terms of (a) the resolidification of nonequilibrium librium liquid present during the early stages of heat treatment and (b) the presence of carbide and other phases which pin the grain boundaries. Grain size data fit slightly better to cubic rather than parabolic kinetics, indicating an Ostwald ripening-type mechanism. |
| spellingShingle | Underhill, R Grant, P Bryant, D Cantor, B Grain growth in spray-formed Ni superalloys |
| title | Grain growth in spray-formed Ni superalloys |
| title_full | Grain growth in spray-formed Ni superalloys |
| title_fullStr | Grain growth in spray-formed Ni superalloys |
| title_full_unstemmed | Grain growth in spray-formed Ni superalloys |
| title_short | Grain growth in spray-formed Ni superalloys |
| title_sort | grain growth in spray formed ni superalloys |
| work_keys_str_mv | AT underhillr graingrowthinsprayformednisuperalloys AT grantp graingrowthinsprayformednisuperalloys AT bryantd graingrowthinsprayformednisuperalloys AT cantorb graingrowthinsprayformednisuperalloys |