Modelling of zirconium alloy hydrogenation

Zirconium alloys are the construction materials for critical elements in active zones of nuclear power reactors. During the operation of reactors such materials are subject to hydrogenation. Hydrogenation results in a decrease of alloy plasticity and cracking resistance. The formation of brittle hyd...

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Published inJournal of physics. Conference series Vol. 769; no. 1; pp. 12028 - 12033
Main Authors Zaika, Yury V, Rodchenkova, Natalia I
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.11.2016
Subjects
Absorptivity
Algorithms
Boundary value problems
Construction materials
Crack tips
Free boundaries
Hydrides
Hydrogen embrittlement
Hydrogenation
Iterative methods
Mathematical models
Nuclear power reactors
Nuclear reactors
Physics
Power reactors
Zirconium alloys
Zirconium base alloys
Online AccessGet full text
ISSN1742-6588
1742-6596
DOI10.1088/1742-6596/769/1/012028

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Abstract Zirconium alloys are the construction materials for critical elements in active zones of nuclear power reactors. During the operation of reactors such materials are subject to hydrogenation. Hydrogenation results in a decrease of alloy plasticity and cracking resistance. The formation of brittle hydrides at crack tips can result in severe embrittlement. One of the most important requirements for the reactor's active zone materials is low hydrogen absorptivity. The mathematical model of hydride layer formation and growth is developed. The problem is to determine the dynamics of the free boundary of phase interface and the distributions of hydrogen concentration in hydride and in solution. Iterative computational algorithm for solving the nonlinear boundary-value problem with the Stefan condition based on implicit difference schemes is developed.
AbstractList Zirconium alloys are the construction materials for critical elements in active zones of nuclear power reactors. During the operation of reactors such materials are subject to hydrogenation. Hydrogenation results in a decrease of alloy plasticity and cracking resistance. The formation of brittle hydrides at crack tips can result in severe embrittlement. One of the most important requirements for the reactor's active zone materials is low hydrogen absorptivity. The mathematical model of hydride layer formation and growth is developed. The problem is to determine the dynamics of the free boundary of phase interface and the distributions of hydrogen concentration in hydride and in solution. Iterative computational algorithm for solving the nonlinear boundary-value problem with the Stefan condition based on implicit difference schemes is developed.
Author Rodchenkova, Natalia I
Zaika, Yury V
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Cites_doi 10.1016/j.ijhydene.2010.05.092
10.1016/j.ijhydene.2014.01.158
10.1016/j.ijhydene.2010.07.099
10.1002/9783527629800
10.1016/j.surfcoat.2015.07.082
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10.1007/s00707-007-0568-z
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2016. This work is published under http://creativecommons.org/licenses/by/3.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.
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References Pisarev A A (2) 2008
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Zaika Yu V (11) 2013
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StartPage 12028
SubjectTerms Absorptivity
Algorithms
Boundary value problems
Construction materials
Crack tips
Free boundaries
Hydrides
Hydrogen embrittlement
Hydrogenation
Iterative methods
Mathematical models
Nuclear power reactors
Nuclear reactors
Physics
Power reactors
Zirconium alloys
Zirconium base alloys
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Title Modelling of zirconium alloy hydrogenation
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