The measurement of stress and phase fraction distributions in pre and post-transition Zircaloy oxides using nano-beam synchrotron X-ray diffraction

Swan, Helen; Blackmur, Matthew S.; Hyde, J.M.; Laferrere, Alice; Ortner, Susan; Styman, Paul; Staines, C.; Gass, Mhairi; Hulme, Helen; Cole-Baker, Aidan; Frankel, Philipp

doi:10.1016/j.jnucmat.2016.07.024

Cited by 30 publications

(24 citation statements)

References 45 publications

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“…In both cases, the compressive stress seems to have its maximum value at the transition stage, and relaxes to a lower magnitude with further corrosion. These results agree with the trends of changes in stress profiles obtained from synchrotron X-ray diffraction which was reported in previous work [9,14] .…”

Section: Accepted Manuscriptsupporting

confidence: 93%

“…Several researchers have noted that the oxide comprises a metastable tetragonal phase and an energetically stable monoclinic phase of ZrO2 [7][8][9][10][11][12][13] . The tetragonal phase develops locally when oxidation occurs; it has a smaller grain size and is believed to be stabilised by the high compressive stress in the oxide layer .…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…Corrosion in zirconium alloys is a complicated electrochemical process which is influenced by several factors, including the properties of the metal/oxide interface, water chemistry, pressure, irradiation, and time. Although many reported works [1][2][3][4][5][6][7][8][9] have studied numerous factors affecting the corrosion processes, and considerable understanding of the corrosion mechanisms have been secured, there are many effects that are still not fully understood: in particular, the relationships between the residual stresses that are generated between the oxide film and the substrate, the structural phase content, and the kinetics of corrosion. Better understanding can lead to the development of alloys * kokboonc@sunway.eduy.my † ab6856@coventry.ac.uk…”

Section: Introductionmentioning

confidence: 99%

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Evolution of stress fields and phase content in corroded zirconium cladding materials

Chong

Fitzpatrick

2017

Surface and Coatings Technology

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In this study, the evolution of stress fields and structural phase composition have been studied using Raman spectroscopy pre-and post-transition in the oxide layer of recrystallised ZIRLO and recrystallised zircaloy-4 (Zr-4) after corrosion exposure in a static autoclave. The structural phase composition analysis showed that the proportion of the tetragonal zirconia phase on the surface decreased with increasing corrosion time. High compressive stresses were found in the thin oxide, increasing with corrosion time, reaching a maximum in the transition period and decreasing slightly after that. The results show the relationship between the crystallographic phase and the residual stresses developed in the oxide.

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Section: Accepted Manuscriptsupporting

confidence: 93%

Section: Accepted Manuscriptmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evolution of stress fields and phase content in corroded zirconium cladding materials

Chong

Fitzpatrick

2017

Surface and Coatings Technology

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“…The macro-scale compressive stress, micro-scale stress concentrations, grain boundary porosity, and lateral crack distributions through the oxide layer all vary depending on the thickness of the oxide & oxidation time relative to the transition points in the oxidation kinetics (Berdin et al, 2015;Ni et al, 2010;P Platt et al, 2015;P. Platt et al, 2015b;Polatidis et al, 2013;Swan et al, 2016). Given the range of simultaneously occurring factors in either of these material degradation scenarios attributing one experimental outcome to a specific input can be misleading.…”

Section: Development and Validationmentioning

confidence: 99%

Peridynamic simulations of the tetragonal to monoclinic phase transformation in zirconium dioxide

Platt

Mella

DeMaio

et al. 2017

Computational Materials Science

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Whether present as a manufactured stabilised ceramic, or as an oxide layer on zirconium alloys, mechanical degradation in zirconia is influenced by the tetragonal to monoclinic phase transformation.Peridynamic theory was implemented within the Abaqus finite element framework to understand how the tetragonal to monoclinic phase transformation can itself cause fracture in zirconia. In 2D these simulations represent a single grain, transforming via an isometric dilational expansion, surrounded by a homogenous monoclinic oxide. The effect of transformation time, applied bi-axial pressure, and the fracture strain were assessed using the change in strain energy and the amount of damage in the oxide surrounding the transformed grain. Reducing the applied compressive stress or applying a tensile stress reduces the transformation strain energy. The introduction of a fracture strain leads to damage in the surrounding oxide region largely in the form of cracks, and reduces the transformation strain energy further by reducing the constraint on the transforming grain. The extent of the fracture, and reduction in constraint on the transformed grain, is more significant with the application of a biaxial tensile pressure.

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“…This will allow its performance in reactor, in storage and in disposal conditions to be better understood and predicted [10,11].…”

Section: Developments In Fuel Technologymentioning

confidence: 99%

Challenges to deployment of twenty-first century nuclear reactor systems

Ion¹

2017

Proc. R. Soc. A.

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The science and engineering of materials have always been fundamental to the success of nuclear power to date. They are also the key to the successful deployment and operation of a new generation of nuclear reactor systems and their associated fuel cycles. This article reflects on some of the historical issues, the challenges still prevalent today and the requirement for significant ongoing materials R&D and discusses the potential role of small modular reactors.

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The measurement of stress and phase fraction distributions in pre and post-transition Zircaloy oxides using nano-beam synchrotron X-ray diffraction

Cited by 30 publications

References 45 publications

Evolution of stress fields and phase content in corroded zirconium cladding materials

Evolution of stress fields and phase content in corroded zirconium cladding materials

Peridynamic simulations of the tetragonal to monoclinic phase transformation in zirconium dioxide

Challenges to deployment of twenty-first century nuclear reactor systems

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