Temperature and strain controls on ice deformation mechanisms: insights from the microstructures of samples deformed to progressively higher strains at −10, −20 and −30 °C
In order to better understand ice deformation mechanisms, we document the microstructural evolution of ice with increasing strain. We include data from experiments at relatively low temperatures ( −20 and −30 ∘ C), where the microstructural evolution with axial strain has never before been documente...
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2020
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ftdoajarticles:oai:doaj.org/article:3cb50feea3b148cf9b620080dbd9311a 2023-05-15T18:32:28+02:00 Temperature and strain controls on ice deformation mechanisms: insights from the microstructures of samples deformed to progressively higher strains at −10, −20 and −30 °C S. Fan T. F. Hager D. J. Prior A. J. Cross D. L. Goldsby C. Qi M. Negrini J. Wheeler 2020-11-01T00:00:00Z https://doi.org/10.5194/tc-14-3875-2020 https://doaj.org/article/3cb50feea3b148cf9b620080dbd9311a EN eng Copernicus Publications https://tc.copernicus.org/articles/14/3875/2020/tc-14-3875-2020.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-14-3875-2020 1994-0416 1994-0424 https://doaj.org/article/3cb50feea3b148cf9b620080dbd9311a The Cryosphere, Vol 14, Pp 3875-3905 (2020) Environmental sciences GE1-350 Geology QE1-996.5 article 2020 ftdoajarticles https://doi.org/10.5194/tc-14-3875-2020 2022-12-31T13:34:38Z In order to better understand ice deformation mechanisms, we document the microstructural evolution of ice with increasing strain. We include data from experiments at relatively low temperatures ( −20 and −30 ∘ C), where the microstructural evolution with axial strain has never before been documented. Polycrystalline pure water ice was deformed under a constant displacement rate (strain rate <math xmlns="http://www.w3.org/1998/Math/MathML" id="M8" display="inline" overflow="scroll" dspmath="mathml"><mrow><mo>∼</mo><mn mathvariant="normal">1.0</mn><mo>×</mo><msup><mn mathvariant="normal">10</mn><mrow><mo>-</mo><mn mathvariant="normal">5</mn></mrow></msup></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="61pt" height="13pt" class="svg-formula" dspmath="mathimg" md5hash="70dcb4f99f203b8abffe7bb413ebd79e"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="tc-14-3875-2020-ie00001.svg" width="61pt" height="13pt" src="tc-14-3875-2020-ie00001.png"/></svg:svg> s −1 ) to progressively higher strains ( ∼ 3 %, 5 %, 8 %, 12 % and 20 %) at temperatures of −10 , −20 and −30 ∘ C. Microstructural data were generated from cryogenic electron backscattered diffraction (cryo-EBSD) analyses. All deformed samples contain subgrain (low-angle misorientations) structures with misorientation axes that lie dominantly in the basal plane, suggesting the activity of dislocation creep (glide primarily on the basal plane), recovery and subgrain rotation. Grain boundaries are lobate in all experiments, suggesting the operation of strain-induced grain boundary migration (GBM). Deformed ice samples are characterized by interlocking big and small grains and are, on average, finer grained than undeformed samples. Misorientation analyses between nearby grains in 2-D EBSD maps are consistent with some 2-D grains being different limbs of the same irregular grain in the 3-D volume. ... Article in Journal/Newspaper The Cryosphere Directory of Open Access Journals: DOAJ Articles The Cryosphere 14 11 3875 3905 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
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Environmental sciences GE1-350 Geology QE1-996.5 S. Fan T. F. Hager D. J. Prior A. J. Cross D. L. Goldsby C. Qi M. Negrini J. Wheeler Temperature and strain controls on ice deformation mechanisms: insights from the microstructures of samples deformed to progressively higher strains at −10, −20 and −30 °C |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
In order to better understand ice deformation mechanisms, we document the microstructural evolution of ice with increasing strain. We include data from experiments at relatively low temperatures ( −20 and −30 ∘ C), where the microstructural evolution with axial strain has never before been documented. Polycrystalline pure water ice was deformed under a constant displacement rate (strain rate <math xmlns="http://www.w3.org/1998/Math/MathML" id="M8" display="inline" overflow="scroll" dspmath="mathml"><mrow><mo>∼</mo><mn mathvariant="normal">1.0</mn><mo>×</mo><msup><mn mathvariant="normal">10</mn><mrow><mo>-</mo><mn mathvariant="normal">5</mn></mrow></msup></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="61pt" height="13pt" class="svg-formula" dspmath="mathimg" md5hash="70dcb4f99f203b8abffe7bb413ebd79e"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="tc-14-3875-2020-ie00001.svg" width="61pt" height="13pt" src="tc-14-3875-2020-ie00001.png"/></svg:svg> s −1 ) to progressively higher strains ( ∼ 3 %, 5 %, 8 %, 12 % and 20 %) at temperatures of −10 , −20 and −30 ∘ C. Microstructural data were generated from cryogenic electron backscattered diffraction (cryo-EBSD) analyses. All deformed samples contain subgrain (low-angle misorientations) structures with misorientation axes that lie dominantly in the basal plane, suggesting the activity of dislocation creep (glide primarily on the basal plane), recovery and subgrain rotation. Grain boundaries are lobate in all experiments, suggesting the operation of strain-induced grain boundary migration (GBM). Deformed ice samples are characterized by interlocking big and small grains and are, on average, finer grained than undeformed samples. Misorientation analyses between nearby grains in 2-D EBSD maps are consistent with some 2-D grains being different limbs of the same irregular grain in the 3-D volume. ... |
format |
Article in Journal/Newspaper |
author |
S. Fan T. F. Hager D. J. Prior A. J. Cross D. L. Goldsby C. Qi M. Negrini J. Wheeler |
author_facet |
S. Fan T. F. Hager D. J. Prior A. J. Cross D. L. Goldsby C. Qi M. Negrini J. Wheeler |
author_sort |
S. Fan |
title |
Temperature and strain controls on ice deformation mechanisms: insights from the microstructures of samples deformed to progressively higher strains at −10, −20 and −30 °C |
title_short |
Temperature and strain controls on ice deformation mechanisms: insights from the microstructures of samples deformed to progressively higher strains at −10, −20 and −30 °C |
title_full |
Temperature and strain controls on ice deformation mechanisms: insights from the microstructures of samples deformed to progressively higher strains at −10, −20 and −30 °C |
title_fullStr |
Temperature and strain controls on ice deformation mechanisms: insights from the microstructures of samples deformed to progressively higher strains at −10, −20 and −30 °C |
title_full_unstemmed |
Temperature and strain controls on ice deformation mechanisms: insights from the microstructures of samples deformed to progressively higher strains at −10, −20 and −30 °C |
title_sort |
temperature and strain controls on ice deformation mechanisms: insights from the microstructures of samples deformed to progressively higher strains at −10, −20 and −30 °c |
publisher |
Copernicus Publications |
publishDate |
2020 |
url |
https://doi.org/10.5194/tc-14-3875-2020 https://doaj.org/article/3cb50feea3b148cf9b620080dbd9311a |
genre |
The Cryosphere |
genre_facet |
The Cryosphere |
op_source |
The Cryosphere, Vol 14, Pp 3875-3905 (2020) |
op_relation |
https://tc.copernicus.org/articles/14/3875/2020/tc-14-3875-2020.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-14-3875-2020 1994-0416 1994-0424 https://doaj.org/article/3cb50feea3b148cf9b620080dbd9311a |
op_doi |
https://doi.org/10.5194/tc-14-3875-2020 |
container_title |
The Cryosphere |
container_volume |
14 |
container_issue |
11 |
container_start_page |
3875 |
op_container_end_page |
3905 |
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1766216583848394752 |