Journal
SCRIPTA MATERIALIA
Volume 117, Issue -, Pages 20-23Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2016.02.021
Keywords
Zirconium alloys; Creep; High temperature deformation; Oxidation; Embrittlement
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Funding
- AREVA NP
- EDF
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During hypothetical Loss-Of-Coolant-Accident (LOCA) scenario, zirconium alloy fuel cladding tubes are exposed to internal pressure and high temperature oxidation, so that an oxygen-stabilized alpha(0) phase, forms from the outer surface of the cladding, under the zirconia oxide layer. The high-temperature viscoplastic flow and fracture behavior of the alpha(0) phase were characterized through axial creep tests performed under vacuum, on representative model materials containing 10-30 at.% of oxygen. Creep strengthening and ductile-to-brittle transition were quantified as a function of oxygen content and test temperature, and modeled into viscoplastic flow constitutive equations and an empirical fracture criterion. (C) 2016 Elsevier Ltd. All rights reserved.
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