Understanding irradiation-induced nanoprecipitation in zirconium alloys using parallel TEM and APT
We investigate nano-scale irradiation-induced precipitation in a ZrSnFeCrNi-alloy (Zircaloy-2) by combining atom probe tomography (APT) for chemical detail with scanning transmission electron microscopy (STEM) and high resolution energy dispersive X-ray (EDX) spectroscopy for wider context and compl...
| Main Authors: | , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
Elsevier
2018
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| _version_ | 1826280630106718208 |
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| author | Harte, A Prasath Babu, R Hirst, C Martin, T Bagot, P Moody, M Frankel, P Romero, J Hallstadius, L Darby, E Preuss, M |
| author_facet | Harte, A Prasath Babu, R Hirst, C Martin, T Bagot, P Moody, M Frankel, P Romero, J Hallstadius, L Darby, E Preuss, M |
| author_sort | Harte, A |
| collection | OXFORD |
| description | We investigate nano-scale irradiation-induced precipitation in a ZrSnFeCrNi-alloy (Zircaloy-2) by combining atom probe tomography (APT) for chemical detail with scanning transmission electron microscopy (STEM) and high resolution energy dispersive X-ray (EDX) spectroscopy for wider context and complimentary and correlative TEM diffraction techniques for crystallographic relationships. We find that Fe and Cr-rich nano-rods precipitate in Zircaloy-2 following proton irradiation at 350 °C to a low dose of ∼2 dpa. The long-axis of the nano-rods are aligned in a direction 12–15° from the Zr matrix , align in the basal plane and are of width 1.5–5 nm. Smaller rods are of APT-determined composition Zr4(Fe0.67Cr0.33), tending towards Zr3(Fe0.69Cr0.31) as the rod volume increases to > ∼400 nm3, in agreement with STEM-EDX determination of composition resembling that of Zr3Fe with Cr replacing some of the Fe. The Fe/Cr ratio has been shown to increase with distance from the nearest partially-dissolved Zr(Fe,Cr)2 phase particle. The nucleation of nano rods has implications for macroscopic irradiation-induced deformation phenomena, irradiation-induced hardening and the evolution of dislocation loops and other defects. |
| first_indexed | 2024-03-07T00:16:34Z |
| format | Journal article |
| id | oxford-uuid:7b084288-48b5-4ed1-bb6c-c17b2292947a |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T00:16:34Z |
| publishDate | 2018 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | oxford-uuid:7b084288-48b5-4ed1-bb6c-c17b2292947a2022-03-26T20:48:03ZUnderstanding irradiation-induced nanoprecipitation in zirconium alloys using parallel TEM and APTJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:7b084288-48b5-4ed1-bb6c-c17b2292947aEnglishSymplectic Elements at OxfordElsevier2018Harte, APrasath Babu, RHirst, CMartin, TBagot, PMoody, MFrankel, PRomero, JHallstadius, LDarby, EPreuss, MWe investigate nano-scale irradiation-induced precipitation in a ZrSnFeCrNi-alloy (Zircaloy-2) by combining atom probe tomography (APT) for chemical detail with scanning transmission electron microscopy (STEM) and high resolution energy dispersive X-ray (EDX) spectroscopy for wider context and complimentary and correlative TEM diffraction techniques for crystallographic relationships. We find that Fe and Cr-rich nano-rods precipitate in Zircaloy-2 following proton irradiation at 350 °C to a low dose of ∼2 dpa. The long-axis of the nano-rods are aligned in a direction 12–15° from the Zr matrix , align in the basal plane and are of width 1.5–5 nm. Smaller rods are of APT-determined composition Zr4(Fe0.67Cr0.33), tending towards Zr3(Fe0.69Cr0.31) as the rod volume increases to > ∼400 nm3, in agreement with STEM-EDX determination of composition resembling that of Zr3Fe with Cr replacing some of the Fe. The Fe/Cr ratio has been shown to increase with distance from the nearest partially-dissolved Zr(Fe,Cr)2 phase particle. The nucleation of nano rods has implications for macroscopic irradiation-induced deformation phenomena, irradiation-induced hardening and the evolution of dislocation loops and other defects. |
| spellingShingle | Harte, A Prasath Babu, R Hirst, C Martin, T Bagot, P Moody, M Frankel, P Romero, J Hallstadius, L Darby, E Preuss, M Understanding irradiation-induced nanoprecipitation in zirconium alloys using parallel TEM and APT |
| title | Understanding irradiation-induced nanoprecipitation in zirconium alloys using parallel TEM and APT |
| title_full | Understanding irradiation-induced nanoprecipitation in zirconium alloys using parallel TEM and APT |
| title_fullStr | Understanding irradiation-induced nanoprecipitation in zirconium alloys using parallel TEM and APT |
| title_full_unstemmed | Understanding irradiation-induced nanoprecipitation in zirconium alloys using parallel TEM and APT |
| title_short | Understanding irradiation-induced nanoprecipitation in zirconium alloys using parallel TEM and APT |
| title_sort | understanding irradiation induced nanoprecipitation in zirconium alloys using parallel tem and apt |
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