Revisiting the method to obtain the mechanical properties of hydrided fuel cladding in the hoop direction

Martín Rengel, Miguel Ángel and Gómez Sánchez, Francisco Javier and Ruiz Hervías, Jesús and Caballero Molano, Luis and Valiente Cancho, Andrés (2012). Revisiting the method to obtain the mechanical properties of hydrided fuel cladding in the hoop direction. "Journal of Nuclear Materials", v. 429 (n. 1–3); pp. 276-283. ISSN 0022-3115. https://doi.org/10.1016/j.jnucmat.2012.06.003.

Description

Title: Revisiting the method to obtain the mechanical properties of hydrided fuel cladding in the hoop direction
Author/s:
  • Martín Rengel, Miguel Ángel
  • Gómez Sánchez, Francisco Javier
  • Ruiz Hervías, Jesús
  • Caballero Molano, Luis
  • Valiente Cancho, Andrés
Item Type: Article
Título de Revista/Publicación: Journal of Nuclear Materials
Date: October 2012
ISSN: 0022-3115
Volume: 429
Subjects:
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Ciencia de los Materiales
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The method reported in the literature to calculate the stress–strain curve of nuclear fuel cladding from ring tensile test is revisited in this paper and a new alternative is presented. In the former method, two universal curves are introduced under the assumption of small strain. In this paper it is shown that these curves are not universal, but material-dependent if geometric nonlinearity is taken into account. The new method is valid beyond small strains, takes geometric nonlinearity into consideration and does not need universal curves. The stress–strain curves in the hoop direction are determined by combining numerical calculations with experimental results in a convergent loop. To this end, ring tensile tests were performed in unirradiated hydrogen-charged samples. The agreement among the simulations and the experimental results is excellent for the range of concentrations tested (up to 2000 wppm hydrogen). The calculated stress–strain curves show that the mechanical properties do not depend strongly on the hydrogen concentration, and that no noticeable strain hardening occurs. However, ductility decreases with the hydrogen concentration, especially beyond 500 wppm hydrogen. The fractographic results indicate that as-received samples fail in a ductile fashion, whereas quasicleavage is bserved in the hydrogen-charged samples.

More information

Item ID: 16461
DC Identifier: http://oa.upm.es/16461/
OAI Identifier: oai:oa.upm.es:16461
DOI: 10.1016/j.jnucmat.2012.06.003
Official URL: http://www.sciencedirect.com/science/article/pii/S0022311512002814
Deposited by: Memoria Investigacion
Deposited on: 25 Oct 2013 07:43
Last Modified: 01 Nov 2014 23:56
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