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Simulation by classical molecular dynamics of the influence of radiation effects on the fracture behavior of simplified nuclear glasses

Published online by Cambridge University Press:  23 March 2012

Le-Hai Kieu ,
Jean-Marc Delaye  and
Claude Stolz
Le-Hai Kieu
Affiliation:
Service d’Études et Comportement des Matériaux de Conditionnement, DEN/DTCD/SECM, CEAEA Marcoule, BP 17171, 30207 Bagnols sur Cèze, France
Jean-Marc Delaye
Affiliation:
Service d’Études et Comportement des Matériaux de Conditionnement, DEN/DTCD/SECM, CEAEA Marcoule, BP 17171, 30207 Bagnols sur Cèze, France
Claude Stolz
Affiliation:
Laboratoire de Mécanique des Solides, CNRS UMR7649, Ecole Polytechnique, 91128 Palaiseau, France
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Abstract

Classical molecular dynamics simulations were used to compare the fracture behavior of pristine and disordered specimens of a simplified nuclear glass. The disordered specimen is prepared in order to mimic the effects of accumulating displacement cascades. It is characterized by a decreasing Boron coordination and an increasing Na concentration in a modifying role. We observe an enhancement of the plasticity of the disordered glass and a decrease of the elastic limit, resulting in greater fracture toughness. The simulation findings are consistent with experimental results.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1475: Symposium NW – Scientific Basis for Nuclear Waste Management XXXV , 2012 , imrc11-1475-nw35-o40
Copyright
Copyright © Materials Research Society 2012

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References

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