A Review of Texture and Texture Formation in Zircaloy Tubing

Tenckhoff, E.

doi:10.1520/stp37043s

Cited by 20 publications

(8 citation statements)

References 23 publications

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“…This inclination is just outside the peak range of 20° to 40° corresponding to the typical crystallographic texture in single-phase Zr alloys used in the nuclear industry 30,53 . This texture is called 'split-basal' due to a symmetrical 'split' of the hcp basal pole with respect to ND 30 . In oxide region 1, we measured 49,938 monoclinic grains and 1,847 tetragonal grains, or a tetragonal phase fraction of 3.6%.…”

Section: Electron Backscatter Diffractionmentioning

confidence: 85%

“…Reference source not found.a, the Zr hcp crystal of grain 1 is positioned so that the basal pole <0002>Zr is inclined at about 46° to the normal direction (ND). This inclination is just outside the peak range of 20° to 40° corresponding to the typical crystallographic texture in single-phase Zr alloys used in the nuclear industry 30,53 . This texture is called 'split-basal' due to a symmetrical 'split' of the hcp basal pole with respect to ND 30 .…”

Section: Electron Backscatter Diffractionmentioning

confidence: 85%

“…In the dual-phase Zr-2.5%Nb alloys with a well-defined substrate texture, bulk XRD oxide texture measurements established lattice matching between different metal faces and the ZrO2 film during oxide nucleation, followed by a preferential growth of specific oxide orientations 29 . In contrast, single-phase Zr alloys with typical 'split-basal' texture 30 (characterised by a 20° to 40° incline of the c-axis of the hcp-Zr lattice with respect to the surface) did not show strong oxide texture or effects on corrosion kinetics 31 . This lack of effect is an artefact of measuring the macrotexture of the material and, as we will show later, metal-oxide orientation relationships do in fact form in single-phase Zr alloys.…”

Section: Main Textmentioning

confidence: 89%

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Untangling competition between epitaxial strain and growth stress through examination of variations in local oxidation

Yankova

Garner

Baxter

et al. 2021

Preprint

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Understanding oxide formation during corrosion of high-performance alloys in harsh environments is of great fundamental and industrial interest and provides a potential route for reducing the significant annual cost of corrosion globally. However, corrosion mechanisms involve multiple length scales, requiring a multitude of advanced experimental procedures. Here, we use correlated high resolution electron microscopy techniques over a range of length scales, combined with crystallographic modelling to show that there is a clear competition between epitaxial strain and growth stress during oxidation. The degree to which these competing mechanisms operate is shown to depend on the orientation of the substrate grains leading to significant local variations in oxide microstructure and thus protectiveness, even across a single sample. This leads to the possibility of tailoring substrate crystallographic textures in order to promote gradual phase transformation and the development of stress driven, well-oriented protective oxides, and so to improving overall corrosion performance.

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Section: Electron Backscatter Diffractionmentioning

confidence: 85%

Section: Electron Backscatter Diffractionmentioning

confidence: 85%

Section: Main Textmentioning

confidence: 89%

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Untangling competition between epitaxial strain and growth stress through examination of variations in local oxidation

Yankova

Garner

Baxter

et al. 2021

Preprint

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“…The density value of {1120} pole is stronger reaching 3.15. The {1120} plane is centrally distributed along the axial direction (AD) is the main characteristic of recrystallization texture of α type titanium alloy [28].…”

Section: Texture Evolutionmentioning

confidence: 99%

Effect of ‘Q’ Ratio on Texture Evolution of Ti-3Al-2.5V Alloy Tube during Rolling

Hui

et al. 2022

Materials

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Ti-3Al-2.5V alloy was usually the α phase of HCP structure at room temperature which had obvious anisotropy. During tube rolling, α grain would be influenced by stress-strain state, deformation amount, ‘Q’ ratio to result the preferred orientation and formed texture. In order to obtain radial texture tube by rolling and improve the service quality of tube in the pipeline system, Φ25 mm Ti-3Al-2.5V alloy tubes was selected as billet for the experiment, and four kinds of tubes with outer diameter of Φ16mm was produced by single pass cold rolling with ‘Q’ ratios ranging from 0.65 to 2.0. The effect of ‘Q’ ratio on the texture of Ti-3Al-2.5V tube was studied. The result indicted that the initial texture of the tube is radial-circumferential equally distributed, and the radial basal texture enhances gradually with increasing ‘Q’ ratio. Since the angle between the C-axis of grain and the radial axis of RD decreases, the C-axis of grain distributes to the radial direction, and the more grain orientation from {112(—)X} pyramidal to {0001} basal plane. The different ‘Q’ ratio would lead to different strain along the radial direction, circumferential direction, axial direction, thus affected the crystal orientation and distribution during tube rolling deformation. When ‘Q’ > 1, the tube mainly produced radial basal texture. By comparison with ‘Q’ < 1, the tube mainly produced circumferential basal texture. As a result, when the initial texture of the tube is radial-circumferential equally distributed, the ideal radial texture of the tube can be obtained by choosing rolling process with ‘Q’ > 2.0.

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“…Flow chart of zirconium extraction process from zircon ore[2]. Texture development in Zirc fuel tubes depending on thermo-mechanical process variations in tube extraction[3]. 2.…”

mentioning

confidence: 99%

Zirconium Alloys for Fuel Element Structures

Bart¹,

Bertsch²

2005

Chimia

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Today more than 400 light water power reactors (LWRs) operate worldwide providing approximately 17% of the world's electricity demand. One important component for their successful operation is the fuel tube, made out of a zirconium alloy. A huge number of out-of-pile and in-pile experiments have been performed to improve step by step the fuel for higher burn-up and to reduce the failure rates of fuel pins close to zero. The influencing parameters for excellent or poor cladding behaviour are numerous and sometimes counteract each other. The process of cladding corrosion is slow, difficult to follow, the mechanistic understanding at best incomplete. A vast amount of literature documents the abundant tests and comes up with hypotheses and models for the materials behaviour. PSI has supported for the past 20 years the development of high burn-up fuel cladding by microstructural research studies and service work in post-irradiation examination of test pins. This article reviews the development of the cladding tubes, focussing on the chemical and materials science aspects.

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A Review of Texture and Texture Formation in Zircaloy Tubing

Cited by 20 publications

References 23 publications

Untangling competition between epitaxial strain and growth stress through examination of variations in local oxidation

Untangling competition between epitaxial strain and growth stress through examination of variations in local oxidation

Effect of ‘Q’ Ratio on Texture Evolution of Ti-3Al-2.5V Alloy Tube during Rolling

Zirconium Alloys for Fuel Element Structures

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