Creep flow and fracture behavior of the oxygen-enriched alpha phase in zirconium alloys

SCRIPTA MATERIALIA

卷:117

Article

Chosson, R.^1,2  Gourgues-Lorenzon, A. F.¹  Vandenberghe, V.³  Brachet, J. C.²  Crepin, J.¹ 

[1] PSL Res Univ, MINES ParisTech, Ctr Mat, UMR CNRS 7633, BP 87, F-91003 Evry, France

[2] CEA Saclay, DEN DMN SRMA, F-91191 Gif Sur Yvette, France

[3] CEA Saclay, DEN DMN SEMI, F-91191 Gif Sur Yvette, France

关键词: Zirconium alloys;    Creep;    High temperature deformation;    Oxidation;    Embrittlement;   

DOI  :  10.1016/j.scriptamat.2016.02.021

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

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