Cr precipitation in neutron irradiated industrial purity Fe–Cr model alloys

The microstructure of four neutron irradiated Fe–Cr model alloys of industrial purity (Fe–2.5%Cr, Fe–5%Cr, Fe–9%Cr and Fe–12%Cr) has been characterized by atom probe tomography (APT). Irradiation has been performed at 300°C up to 0.6dpa in MTR reactor. APT investigations confirmed the enhanced preci...

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Bibliographic Details
Published in:Journal of nuclear materials 2013-01, Vol.432 (1-3), p.160-165
Main Authors: Kuksenko, V., Pareige, C., Pareige, P.
Format: Article
Language:English
Subjects:
Alloys
Applied sciences
Clusters
Condensed Matter
Controled nuclear fusion plants
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Ferrous alloys
Fission nuclear power plants
Fuels
Installations for energy generation and conversion: thermal and electrical energy
Iron
Irradiation
Materials Science
Mathematical models
Nuclear fuels
Physics
Precipitation
Transmission electron microscopy
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Summary:The microstructure of four neutron irradiated Fe–Cr model alloys of industrial purity (Fe–2.5%Cr, Fe–5%Cr, Fe–9%Cr and Fe–12%Cr) has been characterized by atom probe tomography (APT). Irradiation has been performed at 300°C up to 0.6dpa in MTR reactor. APT investigations confirmed the enhanced precipitation of α′ clusters as these clusters have only been observed in supersaturated model alloys. In addition a nonexpected family of clusters has been revealed due to irradiation induced segregation of impurities: NiSiPCr-enriched clusters. They might be associated to defect clusters invisible by transmission electron microscopy (TEM). A quantitative description of these objects is presented in this paper and results are compared with TEM and SANS data of the literature obtained on the same model alloy.
ISSN:0022-3115
1873-4820
DOI:10.1016/j.jnucmat.2012.07.021