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dc.contributor.author
Vizcaino, Pablo
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dc.contributor.author
Flores, A. V.
dc.contributor.author
Bozzano, Patricia Beatriz
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dc.contributor.author
Banchik, Abraham David
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dc.contributor.author
Versaci, R. A.
dc.contributor.author
Ríos, R. O.
dc.date.available
2023-03-28T18:21:33Z
dc.date.issued
2011-01
dc.identifier.citation
Vizcaino, Pablo; Flores, A. V.; Bozzano, Patricia Beatriz; Banchik, Abraham David; Versaci, R. A.; et al.; Hydrogen Solubility and Microstructural Changes in Zircaloy-4 Due to Neutron Irradiation; ASTM International; Journal of ASTM International; 8; 1; 1-2011; 1-20
dc.identifier.issn
1546-962X
dc.identifier.uri
http://hdl.handle.net/11336/191910
dc.description.abstract
The present work deals with two essential degradation mechanisms of zirconium alloys: Hydrogen behavior and microstructural transformations due to neutron irradiation. The studies were carried out by using samples taken from Zircaloy-4 components, which remained for 14 years in the Atucha I pressurized heavy water reactor, accumulating neutron fluences of up to 10E22 neutrons/cm2. A hydrogen/deuterium solubility increase was observed in both dissolution and precipitation processes. With the aim to follow this evolution with radiation damage recovery, the irradiated samples were annealed for different periods at 350 and 400°C in a differential scanning calorimeter (DSC). These temperatures were chosen to reproduce those reached by spent fuels in the early stages of the dry storage (DS). Between intervals, the terminal solid solubility temperatures in dissolution (TTSSd) and in precipitation (TTSSp) were determined. They were also determined after additional annealing at 500 and 600°C, trying to simulate long periods at DS. The hydride morphology and the metallurgical state of the Zr(Fe,Cr)2 second-phase particles (SPPs) were followed between annealing by optical microscopy, analytical electron microscopy, synchrotron light X-ray diffraction (SXRD), and DSC. As a brief summary, we found from the first to the last run of the annealing sequence an increase of 55°C in TTSSd and 40°C in TTSSp on average. The optical and transmission electron microscopies (TEM) indicate that in the material in the irradiated condition, exists a hydride size distribution of four orders of magnitude, from 10 nm to 100 microns, but biased to sizes smaller than 5 _m. A complete amorphisation of the SPPs was observed in high fluence samples by TEM and SXRD. Similar TEM observations made in irradiated samples annealed above 400°C show a re-precipitation process of nano-SPPs forming clusters. The re-precipitation is affected by kinetics: The SPPs crystallization temperature, Tc, rises from 450 to 500°C as the heating rate increases from 5 to 20°C/min. The measured heat of crystallization was 27.3±2.1 kJ/mol (Fe+Cr).
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
ASTM International
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Zircaloy-4
dc.subject
Irradiation
dc.subject
Hydrogen
dc.subject
SPPs
dc.subject
AEM
dc.subject
DSC
dc.subject.classification
Otras Ingeniería de los Materiales
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dc.subject.classification
Ingeniería de los Materiales
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dc.subject.classification
INGENIERÍAS Y TECNOLOGÍAS
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dc.title
Hydrogen Solubility and Microstructural Changes in Zircaloy-4 Due to Neutron Irradiation
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-03-23T12:33:56Z
dc.journal.volume
8
dc.journal.number
1
dc.journal.pagination
1-20
dc.journal.pais
Estados Unidos
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dc.journal.ciudad
West Conshohocken
dc.description.fil
Fil: Vizcaino, Pablo. Comisión Nacional de Energía Atómica. Gerencia de Área de Aplicaciones de la Tecnología Nuclear. Gerencia Ciclo del Combustible Nuclear. Laboratorio de Materia de la Fábrica de Aleaciones Especiales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Flores, A. V.. Comisión Nacional de Energía Atómica; Argentina
dc.description.fil
Fil: Bozzano, Patricia Beatriz. Comisión Nacional de Energía Atómica; Argentina
dc.description.fil
Fil: Banchik, Abraham David. Comisión Nacional de Energía Atómica; Argentina
dc.description.fil
Fil: Versaci, R. A.. Comisión Nacional de Energía Atómica; Argentina
dc.description.fil
Fil: Ríos, R. O.. Comisión Nacional de Energía Atómica; Argentina
dc.journal.title
Journal of ASTM International
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.astm.org/jai102949.html
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