Dilation of h.c.p. zirconium by interstitial deuterium

MacEwen, S.R.; Coleman, C.E.; Ells, C.E.; Faber, J.

doi:10.1016/0001-6160(85)90098-7

Cited by 94 publications

(29 citation statements)

References 11 publications

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“…We analyze the approximations made by each of them, and we apply state-of-the-art density functional theory (DFT) techniques to see whether each of them can reproduce the dipole tensor for H in α-Zr deduced from experimental measurements of the λ-tensor by MacEwen et al [3]. As far as we know this is the first comparison between dipole tensor components deduced from experimental measurements of the λ-tensor and calculations from first principles.…”

mentioning

confidence: 99%

“…MacEwen et al [3] measured changes in the lattice parameters in α-Zr as a function of interstitial deuterium concentration, at temperatures between 727 K and 777 K, using time of flight neutron diffraction. The λ-tensor is defined by λ i j = dε i j /dC D , where C D is the atomic fraction of D-atoms, and ε i j is the eigenstrain tensor caused by D-atoms.…”

mentioning

confidence: 99%

“…Estimated errorbars for lattice constants and elastic constants are in parentheses. Experimental data from (a) measurements at 300K [26] extrapolated to 0K using thermal expansion coefficients in [27], (b) measurements at 4K in [28], (c) [29], (d) [3]. stresses in the system before H is introduced.…”

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confidence: 99%

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First-principles calculation of the elastic dipole tensor of a point defect: Application to hydrogen inα-zirconium

et al. 2016

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First-principles calculation of the elastic dipole tensor of a point defect: Application to hydrogen inα-zirconium

et al. 2016

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“…The numerical application of equation 13, using Q * =25 kJ/mol (Table 2) and V =1.67 cm 3 /mol [83], is displayed in Figure 13. At 375 • C, a 681 MPa/m stress gradient is equivalent to a 10 • C/m thermal gradient in terms of the contribution on hydrogen diffusion.…”

Section: Impact Of the Blister-induced Stress Field On The Hydrogen Tmentioning

confidence: 99%

Formation and characterization of hydride blisters in Zircaloy-4 cladding tubes

Ménibus

Auzoux

Dieye

et al. 2014

Journal of Nuclear Materials

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This article is focused on the formation of hydride blisters in zirconium alloys an experimental and theoritical standpoint, and their characterization in terms of morphology, hydrides crystallographic phases, hardness and hydrogen concentration. An experimental setup was developed to grow hydride blisters on pre-hydrided Zircaloy-4 cladding tubes by thermo-diffusion. The thermal conditions were optimized based on thermo-diffusion calculations, that take into account the hysteresis in the hydrogen solubility limit, to obtain a high blister growth rate. Micro X-Ray Diffraction (XRD), nano-hardness and Elastic Recoil Detection Analysis (ERDA) showed that the blisters contain a hydrogen gradient, with pure δ-hydride phase close to the external surface over one third of the blister depth. thermo-diffusion * Tel.: +33 1 69 08 39 43; e-mail: arthur.hellouin-de-menibus@cea.fr 1 calculations showed these half thickness blisters should grow in only a few days in PWR conditions. Eventually, the Diffusion Equilibrium Threshold (DET) was defined as a criterion that limits the blister growth, and emphasizes that the hysteresis in the hydrogen solubility limit in zirconium must be taken into account to model hydrogen thermo-diffusion in zirconium alloys.

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“…La présence de l'hydrogène en solution conduit à une distorsion anisotrope de la maille cristalline. Cette dilatation est traduite par la variation relative des paramètres de maille a et c sous la forme : a = 1 [30] alors que pour le titane a = 0.02 et c = 0.008 [27]. Ainsi l'expansion le long de l'axe c est plus importante que selon l'axe a dans le cas du zirconium contrairement au cas du titane où c'est l'inverse.…”

Section: Solubilité Et Mobilité De L'hydrogèneunclassified

Influence de l'hydrogène sur les mécanismes de déformation et d'endommagement des alliages de titane et de zirconium

Feaugas

Conforto

2009

PlastOx 2007 - Mécanismes Et Mécanique Des Interactions Plasticité - Environnement

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Résumé. L'hydrogène, élément rarement dissociable des alliages de titane et de zirconium, confèrent à ceux-ci des propriétés physico-chimiques particulières dont les conséquences sur les processus de déformation et d'endommagement sont incontestables. A travers cet écrit nous faisons une synthèse des résultats acquis dans ce domaine en nous attachant à préciser les relations connues entre les différents états microstructuraux des alliages et les propriétés mécaniques. Le point le plus marquant, dans ce contexte, est le rôle du couple oxygène-hydrogène sur les mécanismes de déformation et d'endommagement.

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Dilation of h.c.p. zirconium by interstitial deuterium

Cited by 94 publications

References 11 publications

First-principles calculation of the elastic dipole tensor of a point defect: Application to hydrogen inα-zirconium

First-principles calculation of the elastic dipole tensor of a point defect: Application to hydrogen inα-zirconium

Formation and characterization of hydride blisters in Zircaloy-4 cladding tubes

Influence de l'hydrogène sur les mécanismes de déformation et d'endommagement des alliages de titane et de zirconium

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