The influence of strain rate and presence of dispersed second phases on the deformation behaviour of polycrystalline D₂O ice
This contribution discusses results obtained from 3-D neutron diffraction and 2-D fabric analyser in situ deformation experiments on laboratory-prepared polycrystalline deuterated ice and ice containing a second phase. The two-phase samples used in the experiments are composed of an ice matrix with...
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ftleedsuniv:oai:eprints.whiterose.ac.uk:144804 2023-05-15T16:57:38+02:00 The influence of strain rate and presence of dispersed second phases on the deformation behaviour of polycrystalline D₂O ice Wilson, CJL Hunter, NJR Luzin, V Peternell, M Piazolo, S 2019-02 text https://eprints.whiterose.ac.uk/144804/ https://eprints.whiterose.ac.uk/144804/1/influence_of_strain_rate_and_presence_of_dispersed_second_phases_on_the_deformation_behaviour_of_polycrystalline_d2o_ice.pdf en eng Cambridge University Press https://eprints.whiterose.ac.uk/144804/1/influence_of_strain_rate_and_presence_of_dispersed_second_phases_on_the_deformation_behaviour_of_polycrystalline_d2o_ice.pdf Wilson, CJL, Hunter, NJR, Luzin, V et al. (2 more authors) (2019) The influence of strain rate and presence of dispersed second phases on the deformation behaviour of polycrystalline D₂O ice. Journal of Glaciology, 65 (249). pp. 101-122. ISSN 0022-1430 cc_by_4 CC-BY Article NonPeerReviewed 2019 ftleedsuniv 2023-01-30T22:17:48Z This contribution discusses results obtained from 3-D neutron diffraction and 2-D fabric analyser in situ deformation experiments on laboratory-prepared polycrystalline deuterated ice and ice containing a second phase. The two-phase samples used in the experiments are composed of an ice matrix with (1) air bubbles, (2) rigid, rhombohedral-shaped calcite and (3) rheologically soft, platy graphite. Samples were tested at 10°C below the melting point of deuterated ice at ambient pressures, and two strain rates of 1 × 10−5 s−1 (fast) and 2.5 × 10−6 s−1 (medium). Nature and distribution of the second phase controlled the rheological behaviour of the ice by pinning grain boundary migration. Peak stresses increased with the presence of second-phase particles and during fast strain rate cycles. Ice-only samples exhibit well-developed crystallographic preferred orientations (CPOs) and dynamically recrystallized microstructures, typifying deformation via dislocation creep, where the CPO intensity is influenced in part by the strain rate. CPOs are accompanied by a concentration of [c]-axes in cones about the compression axis, coinciding with increasing activity of prismatic- slip activity. Ice with second phases, deformed in a relatively slower strain rate regime, exhibit greater grain boundary migration and stronger CPO intensities than samples deformed at higher strain rates or strain rate cycles. Article in Journal/Newspaper Journal of Glaciology White Rose Research Online (Universities of Leeds, Sheffield & York) |
institution |
Open Polar |
collection |
White Rose Research Online (Universities of Leeds, Sheffield & York) |
op_collection_id |
ftleedsuniv |
language |
English |
description |
This contribution discusses results obtained from 3-D neutron diffraction and 2-D fabric analyser in situ deformation experiments on laboratory-prepared polycrystalline deuterated ice and ice containing a second phase. The two-phase samples used in the experiments are composed of an ice matrix with (1) air bubbles, (2) rigid, rhombohedral-shaped calcite and (3) rheologically soft, platy graphite. Samples were tested at 10°C below the melting point of deuterated ice at ambient pressures, and two strain rates of 1 × 10−5 s−1 (fast) and 2.5 × 10−6 s−1 (medium). Nature and distribution of the second phase controlled the rheological behaviour of the ice by pinning grain boundary migration. Peak stresses increased with the presence of second-phase particles and during fast strain rate cycles. Ice-only samples exhibit well-developed crystallographic preferred orientations (CPOs) and dynamically recrystallized microstructures, typifying deformation via dislocation creep, where the CPO intensity is influenced in part by the strain rate. CPOs are accompanied by a concentration of [c]-axes in cones about the compression axis, coinciding with increasing activity of prismatic- slip activity. Ice with second phases, deformed in a relatively slower strain rate regime, exhibit greater grain boundary migration and stronger CPO intensities than samples deformed at higher strain rates or strain rate cycles. |
format |
Article in Journal/Newspaper |
author |
Wilson, CJL Hunter, NJR Luzin, V Peternell, M Piazolo, S |
spellingShingle |
Wilson, CJL Hunter, NJR Luzin, V Peternell, M Piazolo, S The influence of strain rate and presence of dispersed second phases on the deformation behaviour of polycrystalline D₂O ice |
author_facet |
Wilson, CJL Hunter, NJR Luzin, V Peternell, M Piazolo, S |
author_sort |
Wilson, CJL |
title |
The influence of strain rate and presence of dispersed second phases on the deformation behaviour of polycrystalline D₂O ice |
title_short |
The influence of strain rate and presence of dispersed second phases on the deformation behaviour of polycrystalline D₂O ice |
title_full |
The influence of strain rate and presence of dispersed second phases on the deformation behaviour of polycrystalline D₂O ice |
title_fullStr |
The influence of strain rate and presence of dispersed second phases on the deformation behaviour of polycrystalline D₂O ice |
title_full_unstemmed |
The influence of strain rate and presence of dispersed second phases on the deformation behaviour of polycrystalline D₂O ice |
title_sort |
influence of strain rate and presence of dispersed second phases on the deformation behaviour of polycrystalline d₂o ice |
publisher |
Cambridge University Press |
publishDate |
2019 |
url |
https://eprints.whiterose.ac.uk/144804/ https://eprints.whiterose.ac.uk/144804/1/influence_of_strain_rate_and_presence_of_dispersed_second_phases_on_the_deformation_behaviour_of_polycrystalline_d2o_ice.pdf |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_relation |
https://eprints.whiterose.ac.uk/144804/1/influence_of_strain_rate_and_presence_of_dispersed_second_phases_on_the_deformation_behaviour_of_polycrystalline_d2o_ice.pdf Wilson, CJL, Hunter, NJR, Luzin, V et al. (2 more authors) (2019) The influence of strain rate and presence of dispersed second phases on the deformation behaviour of polycrystalline D₂O ice. Journal of Glaciology, 65 (249). pp. 101-122. ISSN 0022-1430 |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
_version_ |
1766049195912855552 |