The influence of prior deformation on hydride precipitation in zircaloy

Perovic, V.; Weatherly, G. C.; MacEwen, S.R.; Leger, M.

doi:10.1016/0956-7151(92)90310-b

Cited by 33 publications

(16 citation statements)

References 19 publications

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“…All the blisters observed by SEM in the present study were cracked. This seems to be in contradiction with the compressive stress field that develops in the blister in the axial and circumferential directions during its growth, due to hydride precipitation-induced expansion [62,77,78]. It has been suggested by Wallace [79] that the cracking could occur during the blister growth due to the protrusion growth.…”

Section: Comparison Of Different Laboratory Grown Blisterscontrasting

confidence: 39%

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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Section: Comparison Of Different Laboratory Grown Blisterscontrasting

confidence: 39%

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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“…In recent studies on zirconium based structural alloys, hydride formation has mainly been studied in Zr-2.5Nb [8,18] and in Zircaloys [2,19,20]. The studies on Zr-2.5Nb or Zr-Nb alloys have shown that the amount of hydride phase and the morphology of hydride precipitated are very sensitive to the morphology and distribution of the b-phase (bcc structure), which has relatively high solubility for hydrogen [8].…”

Section: Introductionmentioning

confidence: 99%

Microstructural study of hydride formation in Zr–1Nb alloy

Neogy

Srivastava

Tewari

et al. 2003

Journal of Nuclear Materials

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“…At that, in the first tube hydrides are situated along tangential direction, while in the second tube -along radial direction. Namely this circumstance confirms existence in the second tube of tangential macrostress before precipitation of the hydride phase, whereas the arrangement of hydrides in the first tube is conditioned by their habit planes, main of which are slip planes, in particular -prismatic ones [7][8]. The tangential macrostress, operating in the second tube, promotes penetration of oxygen inside the tube wall.…”

Section: Experimental Results and Their Discussionmentioning

confidence: 71%

Influence of Interlayer Macrostress on Oxidation of Shell Tubes from Zr-Based Alloys

Isaenkova

Perlovich

Medvedev

et al. 2014

AMR

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Abstract. Shell tubes from Zr-based alloys are responsible construction elements of atomic reactors. Under exploitation these tubes undergo to oxidation, which can become a reason for their cracking. Inevitable texture layering arises by rolling of tubes due to different values of the Q-factor, calculated for inside and outside tube layers. Therefore these layers are characterized by different texture Kearns parameters and, correspondingly, by different thermal expansion. As a result, tensile tangential macrostress operates between layers and oxygen diffusion into tube intensifies.

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The influence of prior deformation on hydride precipitation in zircaloy

Cited by 33 publications

References 19 publications

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

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

Microstructural study of hydride formation in Zr–1Nb alloy

Influence of Interlayer Macrostress on Oxidation of Shell Tubes from Zr-Based Alloys

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