Characterisation of irradiation enhanced strain localisation in a zirconium alloy

Rhys Thomas; David Lunt; Michael Atkinson; João Quinta da Fonseca; Michael Preuss; F Barton; J O'Hanlon; Philipp Frankel

doi:10.1016/j.mtla.2019.100248

Characterisation of irradiation enhanced strain localisation in a zirconium alloy

Rhys Thomas, David Lunt, Michael Atkinson, João Quinta da Fonseca, Michael Preuss, F Barton, J O'Hanlon, Philipp Frankel

Materials Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

High resolution digital image correlation (HR-DIC) has been used to quantify the effect of proton irradiation on strain localisation in Zircaloy-4. Confinement of slip to dislocation channels in irradiated material lead to intense, planar slip bands with high effective shear strain values within channels. More diffuse, homogenous slip is observed in non-irradiated material, with the highest strains observed near grain boundaries. By comparing experimental slip trace angles from HR-DIC with theoretical slip trace angles determined using grain orientations from electron backscatter diffraction (EBSD), the active slip plane was determined. Understanding the localised deformation of irradiated materials relative to their microstructure is essential for valid predictions of the structural integrity, and therefore design life, of components in nuclear applications.

Original language	English
Journal	Acta Materialia
Early online date	10 Feb 2019
DOIs	https://doi.org/10.1016/j.mtla.2019.100248
Publication status	Published - 2019

Keywords

Plasticity,
Slip,
Electron Backscatter Diffraction (EBSD),
Irradiation embrittlement,
High Resolution Digital Image Correlation (HRDIC)

Research Beacons, Institutes and Platforms

Dalton Nuclear Institute

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10.1016/j.mtla.2019.100248Licence: CC BY

LightForm: Embedding Materials Engineering in Manufacturing with Light Alloys
Prangnell, P. (PI), Curioni, M. (CoI), Haigh, S. (CoI), Quinta Da Fonseca, J. (CoI), Robson, J. (CoI), Shanthraj, P. (CoI) & Zhou, X. (CoI)
1/10/17 → 18/10/23
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@article{41993bd7f08e46388c8d312f6ea09536,

title = "Characterisation of irradiation enhanced strain localisation in a zirconium alloy",

abstract = "High resolution digital image correlation (HR-DIC) has been used to quantify the effect of proton irradiation on strain localisation in Zircaloy-4. Confinement of slip to dislocation channels in irradiated material lead to intense, planar slip bands with high effective shear strain values within channels. More diffuse, homogenous slip is observed in non-irradiated material, with the highest strains observed near grain boundaries. By comparing experimental slip trace angles from HR-DIC with theoretical slip trace angles determined using grain orientations from electron backscatter diffraction (EBSD), the active slip plane was determined. Understanding the localised deformation of irradiated materials relative to their microstructure is essential for valid predictions of the structural integrity, and therefore design life, of components in nuclear applications.",

keywords = "Plasticity,, Slip,, Electron Backscatter Diffraction (EBSD),, Irradiation embrittlement,, High Resolution Digital Image Correlation (HRDIC)",

author = "Rhys Thomas and David Lunt and Michael Atkinson and {Quinta da Fonseca}, Jo{\~a}o and Michael Preuss and F Barton and J O'Hanlon and Philipp Frankel",

year = "2019",

doi = "10.1016/j.mtla.2019.100248",

language = "English",

journal = "Acta Materialia",

issn = "2589-1529",

publisher = "Acta Materialia Inc",

}

TY - JOUR

T1 - Characterisation of irradiation enhanced strain localisation in a zirconium alloy

AU - Thomas, Rhys

AU - Lunt, David

AU - Atkinson, Michael

AU - Quinta da Fonseca, João

AU - Preuss, Michael

AU - Barton, F

AU - O'Hanlon, J

AU - Frankel, Philipp

PY - 2019

Y1 - 2019

N2 - High resolution digital image correlation (HR-DIC) has been used to quantify the effect of proton irradiation on strain localisation in Zircaloy-4. Confinement of slip to dislocation channels in irradiated material lead to intense, planar slip bands with high effective shear strain values within channels. More diffuse, homogenous slip is observed in non-irradiated material, with the highest strains observed near grain boundaries. By comparing experimental slip trace angles from HR-DIC with theoretical slip trace angles determined using grain orientations from electron backscatter diffraction (EBSD), the active slip plane was determined. Understanding the localised deformation of irradiated materials relative to their microstructure is essential for valid predictions of the structural integrity, and therefore design life, of components in nuclear applications.

AB - High resolution digital image correlation (HR-DIC) has been used to quantify the effect of proton irradiation on strain localisation in Zircaloy-4. Confinement of slip to dislocation channels in irradiated material lead to intense, planar slip bands with high effective shear strain values within channels. More diffuse, homogenous slip is observed in non-irradiated material, with the highest strains observed near grain boundaries. By comparing experimental slip trace angles from HR-DIC with theoretical slip trace angles determined using grain orientations from electron backscatter diffraction (EBSD), the active slip plane was determined. Understanding the localised deformation of irradiated materials relative to their microstructure is essential for valid predictions of the structural integrity, and therefore design life, of components in nuclear applications.

KW - Plasticity,

KW - Slip,

KW - Electron Backscatter Diffraction (EBSD),

KW - Irradiation embrittlement,

KW - High Resolution Digital Image Correlation (HRDIC)

U2 - 10.1016/j.mtla.2019.100248

DO - 10.1016/j.mtla.2019.100248

M3 - Article

SN - 2589-1529

JO - Acta Materialia

JF - Acta Materialia

ER -

Characterisation of irradiation enhanced strain localisation in a zirconium alloy

Abstract

Keywords

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