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Atom Probe Tomography characterization of the microstructural evolution of a low copper reactor pressure vessel steel under neutron irradiation

Published online by Cambridge University Press:  01 February 2011

Hefei Huang ,
Bertrand Radiguet ,
Patrick Todeschini ,
Guillaume Chas  and
Philippe Pareige
Hefei Huang
Affiliation:
[email protected], GPM-UMR CNRS6634- Université et Insa de Rouen, Saint Etienne du Rouvray, France
Bertrand Radiguet
Affiliation:
[email protected], GPM-UMR CNRS6634- Université et Insa de Rouen, Saint Etienne du Rouvray, France
Patrick Todeschini
Affiliation:
[email protected], EDF-R&D-MMC, Moret sur loing, France
Guillaume Chas
Affiliation:
[email protected], EDF-CEIDRE/DLAB, Chinon, France
Philippe Pareige
Affiliation:
[email protected], GPM-UMR CNRS6634- Université et Insa de Rouen, Saint Etienne du Rouvray, France
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Abstract

A low copper reactor pressure vessel steel was characterised by atom probe tomography after neutron irradiation at different fluences. The specimens were irradiated within the frame of the Surveillance Program of a production reactor. Roughly spherical clusters enriched in nickel, manganese, silicon and, in a lesser extent, phosphorus and copper were observed at all fluences. The chemical composition of these clusters shows no evolution with fluence, as well as their diameter, close to 3 nm. Their number density increases linearly with the neutron fluence. A continuous segregation of the elements found in the clusters is also observed along dislocation lines, with similar enrichments.

Keywords

nanostructureneutron irradiationsteel
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1264: Symposia Z/BB – Basic Actinide Science and Materials for Nuclear Applications , 2010 , 1264-BB05-18
Copyright
Copyright © Materials Research Society 2010

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