Journal ArticleDOI
Roles of texture in controlling oxidation, hydrogen ingress and hydride formation in Zr alloys
TLDR
In this article, the texture and grain-boundary characteristics of oxide are dependent on the texture of metal substrate, and intrinsic factors affecting the oxide microstructure are presented. And a thermodynamic model is developed to analyze the nucleation and the stress-induced reorientation of intergranular hydrides.About:
This article is published in Journal of Nuclear Materials.The article was published on 2012-08-01. It has received 33 citations till now. The article focuses on the topics: Hydride & Texture (crystalline).read more
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The microstructure and microtexture of zirconium oxide films studied by transmission electron backscatter diffraction and automated crystal orientation mapping with transmission electron microscopy
TL;DR: In this article, a detailed characterization of nanostructured thin zirconium oxide films formed during aqueous corrosion of a nuclear-grade ZrConium alloy (Zircaloy-4) has been carried out by means of two novel, ultra-high-spatial-resolution grain mapping techniques, namely automated crystal orientation mapping in the transmission electron microscope (TEM) and transmission electron backscatter diffraction (t-EBSD).
Journal ArticleDOI
The effect of Sn concentration on oxide texture and microstructure formation in zirconium alloys
Alistair Garner,Jing Hu,Allan Harte,Philipp Frankel,Chris R. M. Grovenor,Sergio Lozano-Perez,Michael Preuss +6 more
TL;DR: In this article, the development of oxide texture and microstructure formed on two zirconium alloys with differing Sn contents (Zr-1Nb-1Sn-0.1Fe) has been investigated using transmission Kikuchi diffraction (TKD) in the scanning electron microscope and automated crystal orientation mapping in the transmission electron microscope (TEM).
Journal ArticleDOI
Microstructure and texture analysis of δ-hydride precipitation in Zircaloy-4 materials by electron microscopy and neutron diffraction
Zhiyang Wang,Zhiyang Wang,Ulf Garbe,Huijun Li,Yanbo Wang,Andrew J Studer,Guangai Sun,Robert P. Harrison,Xiaozhou Xiaozhou Liao,M. A. Vicente Alvarez,Javier R. Santisteban,Charlie Kong +11 more
TL;DR: In this article, a detailed microstructure and texture study of various hydrided Zircaloy-4 materials by neutron diffraction and microscopy is presented, and it is shown that the precipitated δ-ZrH1.66 generally follows the δ(111)//α(0001) and δ[1{\overline 1}0]//α[11{overline 2} 0] orientation relationship with the α −Zr matrix, which contributes to the accommodation of the substantial misfit strains associated with hydride precipitation in
Journal ArticleDOI
Investigation of mechanical and microstructural properties of Zircaloy-4 under different experimental conditions
TL;DR: In this article, two types of Zircaloy-4 (alpha-annealed and beta-quenched) were investigated in their different forms, and it was found that mechanical properties of these two types are affected significantly by welding and hydrogen-charging followed by neutron irradiation.
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Grain size effect on the thermally activated twin boundary migration in a zirconium alloy
TL;DR: In this article, electron backscatter diffraction (EBSD) was used to investigate the effect of the initial grain size on the evolution of the tensile twins in the fine-grained sample and coarse grained sample.
References
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In situ XRD analysis of the oxide layers formed by oxidation at 743 K on Zircaloy 4 and Zr–1NbO
TL;DR: In this paper, two alloys, having different oxidation behavior (Zy4 and Zr-1NbO), have been investigated during oxidation at high temperature (743 K) and low oxygen pressure (10 kPa) by in situ X-ray diffraction (XRD).
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Tetragonal phase stability in ZrO2 film formed on zirconium alloys and its effects on corrosion resistance
TL;DR: In this article, a thermodynamic model is developed to understand the origin of variation in the microstructure of ZrO 2 film formed on zirconium alloys and its effects on corrosion resistance.
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Crystallography of Zirconium Hydrides in Recrystallized Zircaloy-2 Fuel Cladding by Electron Backscatter Diffraction
TL;DR: In this paper, the delta-phase Zr hydrides were examined by electron backscatter diffraction (EBSD) and the most common crystallographic relationship for both types of the hyddrides precipitated at the inter- and intra-granular sites was identical at (0001)(alpha) // {111}(delta), with {1017}(alpha) and { 111} (delta) being the occasional exception only for the intergranular radial hydride.
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Intergranular δ-hydride nucleation and orientation in zirconium alloys
TL;DR: In this article, a thermodynamic model is developed to analyze the nucleation and orientation of intergranular δ-hydrides, and the results show that the grain boundary structure and zirconium grain orientation simultaneously govern hydride precipitation.
Journal ArticleDOI
Effect of radial hydrides on the axial and hoop mechanical properties of Zircaloy-4 cladding
TL;DR: In this paper, the effect of radial hydrides on the mechanical properties of stress-relief annealed Zircaloy-4 cladding was studied and a reference hydrogen concentration was defined for assessing the fuel cladding integrity based on a criterion of the tensile strength 600 MPa.