Dynamic Recrystallization in Ice: In-Situ Observation of the Strain Field during Grain Nucleation
International audience Dynamic recrystallization (DRX) occurs in minerals, metals, ice and impact on large scale mechanisms as seismic anisotropy, mechanical properties inside the Earth mantle, material forming and anisotropic flow in polar ice sheet, for instance. In this frame, ice can be consider...
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ftinsu:oai:HAL:hal-02055570v1 2024-04-21T08:05:10+00:00 Dynamic Recrystallization in Ice: In-Situ Observation of the Strain Field during Grain Nucleation Chauve, Thomas Montagnat, Maurine Tommasi, Andrea Vacher, Pierre Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Laboratoire SYstèmes et Matériaux pour la MEcatronique (SYMME) Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry ) San Francisco, United States 2014-12-15 https://hal.science/hal-02055570 en eng HAL CCSD hal-02055570 https://hal.science/hal-02055570 http://creativecommons.org/licenses/by/ AGU Fall Meeting https://hal.science/hal-02055570 AGU Fall Meeting, Dec 2014, San Francisco, United States. pp.1 rheology lithosphere mantle creep plasticity diffusion [SPI.MAT]Engineering Sciences [physics]/Materials info:eu-repo/semantics/conferenceObject Conference papers 2014 ftinsu 2024-04-05T00:44:36Z International audience Dynamic recrystallization (DRX) occurs in minerals, metals, ice and impact on large scale mechanisms as seismic anisotropy, mechanical properties inside the Earth mantle, material forming and anisotropic flow in polar ice sheet, for instance. In this frame, ice can be considered as a model material due to a strong viscoplastic anisotropy and deformation heterogeneities, which are precursors of the recrystallization. During creep deformation at high temperature, DRX occurs from 1% strain and involves grain nucleation and grain boundary migration. As DRX induces an evolution of microstructure and texture, it strongly affects the mechanical behavior, and it is expected to modify the strain field at the grain and/or the sample scale. Creep test (σ=0.5-0.8 MPa) were performed at high temperature (T/Tf 0,98) on granular polycrystalline ice (grains size 1mm) and columnar polycrystalline ice (microstructure 2D 1/2 in plane grain size 10mm) up to 18 % strain. Columnar ice provides interesting feature as it contains only one grain through the thickness and the columns are parallel. Post-deformation texture analysis with an Automatic Ice Texture Analyzer (AITA) and with EBSD (Geoscience Montpellier) were used to investigate DRX impact on texture and microstructure, at different scales. With increasing strain texture evolves to a strong concentrated girdle with a preferential orientation of c-axis close to 35° from the compression axis. During the experiment, local strain field is measured on the surface of the sample by Digital Image Correlation (DIC) with a spatial resolution between 0.2 and 0.5 mm, and a strain resolution between 0.2% to 1%. Grain size being large, we obtain a relatively good intra-granular resolution of the strain field. Thanks to the 2D configuration of the columnar ice samples, we can superimpose the strain field measured by DIC. We will present an overview of the impact of DRX on the texture and microstructure, from the 3D configuration down to a close focus on a triple ... Conference Object Ice Sheet Institut national des sciences de l'Univers: HAL-INSU |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
rheology lithosphere mantle creep plasticity diffusion [SPI.MAT]Engineering Sciences [physics]/Materials |
spellingShingle |
rheology lithosphere mantle creep plasticity diffusion [SPI.MAT]Engineering Sciences [physics]/Materials Chauve, Thomas Montagnat, Maurine Tommasi, Andrea Vacher, Pierre Dynamic Recrystallization in Ice: In-Situ Observation of the Strain Field during Grain Nucleation |
topic_facet |
rheology lithosphere mantle creep plasticity diffusion [SPI.MAT]Engineering Sciences [physics]/Materials |
description |
International audience Dynamic recrystallization (DRX) occurs in minerals, metals, ice and impact on large scale mechanisms as seismic anisotropy, mechanical properties inside the Earth mantle, material forming and anisotropic flow in polar ice sheet, for instance. In this frame, ice can be considered as a model material due to a strong viscoplastic anisotropy and deformation heterogeneities, which are precursors of the recrystallization. During creep deformation at high temperature, DRX occurs from 1% strain and involves grain nucleation and grain boundary migration. As DRX induces an evolution of microstructure and texture, it strongly affects the mechanical behavior, and it is expected to modify the strain field at the grain and/or the sample scale. Creep test (σ=0.5-0.8 MPa) were performed at high temperature (T/Tf 0,98) on granular polycrystalline ice (grains size 1mm) and columnar polycrystalline ice (microstructure 2D 1/2 in plane grain size 10mm) up to 18 % strain. Columnar ice provides interesting feature as it contains only one grain through the thickness and the columns are parallel. Post-deformation texture analysis with an Automatic Ice Texture Analyzer (AITA) and with EBSD (Geoscience Montpellier) were used to investigate DRX impact on texture and microstructure, at different scales. With increasing strain texture evolves to a strong concentrated girdle with a preferential orientation of c-axis close to 35° from the compression axis. During the experiment, local strain field is measured on the surface of the sample by Digital Image Correlation (DIC) with a spatial resolution between 0.2 and 0.5 mm, and a strain resolution between 0.2% to 1%. Grain size being large, we obtain a relatively good intra-granular resolution of the strain field. Thanks to the 2D configuration of the columnar ice samples, we can superimpose the strain field measured by DIC. We will present an overview of the impact of DRX on the texture and microstructure, from the 3D configuration down to a close focus on a triple ... |
author2 |
Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Laboratoire SYstèmes et Matériaux pour la MEcatronique (SYMME) Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry ) |
format |
Conference Object |
author |
Chauve, Thomas Montagnat, Maurine Tommasi, Andrea Vacher, Pierre |
author_facet |
Chauve, Thomas Montagnat, Maurine Tommasi, Andrea Vacher, Pierre |
author_sort |
Chauve, Thomas |
title |
Dynamic Recrystallization in Ice: In-Situ Observation of the Strain Field during Grain Nucleation |
title_short |
Dynamic Recrystallization in Ice: In-Situ Observation of the Strain Field during Grain Nucleation |
title_full |
Dynamic Recrystallization in Ice: In-Situ Observation of the Strain Field during Grain Nucleation |
title_fullStr |
Dynamic Recrystallization in Ice: In-Situ Observation of the Strain Field during Grain Nucleation |
title_full_unstemmed |
Dynamic Recrystallization in Ice: In-Situ Observation of the Strain Field during Grain Nucleation |
title_sort |
dynamic recrystallization in ice: in-situ observation of the strain field during grain nucleation |
publisher |
HAL CCSD |
publishDate |
2014 |
url |
https://hal.science/hal-02055570 |
op_coverage |
San Francisco, United States |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
AGU Fall Meeting https://hal.science/hal-02055570 AGU Fall Meeting, Dec 2014, San Francisco, United States. pp.1 |
op_relation |
hal-02055570 https://hal.science/hal-02055570 |
op_rights |
http://creativecommons.org/licenses/by/ |
_version_ |
1796944678497550336 |