TY - JOUR
T1 - Characterisation of irradiation enhanced strain localisation in a zirconium alloy
AU - Thomas, R.
AU - Lunt, D.
AU - Atkinson, M. D.
AU - Quinta da Fonseca, J.
AU - Preuss, M.
AU - Barton, F.
AU - O'Hanlon, J.
AU - Frankel, P.
PY - 2019/3
Y1 - 2019/3
N2 - High resolution digital image correlation (HRDIC) 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 was observed in non-irradiated material, with the highest strains measured near grain boundaries. By comparing experimental slip trace angles from HRDIC 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 (HRDIC) 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 was observed in non-irradiated material, with the highest strains measured near grain boundaries. By comparing experimental slip trace angles from HRDIC 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 - Electron backscatter diffraction (EBSD)
KW - High resolution digital image correlation (HRDIC)
KW - Irradiation embrittlement
KW - Plasticity
KW - Slip
UR - http://www.scopus.com/inward/record.url?scp=85061577806&partnerID=8YFLogxK
U2 - 10.1016/j.mtla.2019.100248
DO - 10.1016/j.mtla.2019.100248
M3 - Article
AN - SCOPUS:85061577806
VL - 5
JO - Materialia
JF - Materialia
SN - 2589-1529
M1 - 100248
ER -