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<datestamp>2018-01-11</datestamp>
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<title lang=en>Analysis of Dynamic Recrystallization of Ice from EBSD Orientation Mapping</title>
<creator>Montagnat, Maurine</creator>
<creator>chauve, Thomas</creator>
<creator>Barou, Fabrice</creator>
<creator>Tommasi, Andrea</creator>
<creator>Beausir, Benoît</creator>
<creator>Fressengeas, Claude</creator>
<contributor>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 national des sciences de l'Univers (INSU - CNRS) - Centre National de la Recherche Scientifique (CNRS) - Université Joseph Fourier - Grenoble 1 (UJF) - Institut national des sciences de l'Univers (INSU - CNRS) - Centre National de la Recherche Scientifique (CNRS) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux (LEM3) ; Arts et Métiers ParisTech - Université de Lorraine (UL) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<description>International audience</description>
<source>ISSN: 2296-6463</source>
<source>Frontiers in Earth Science</source>
<publisher>Frontiers Media</publisher>
<identifier>hal-01515284</identifier>
<identifier>https://hal.univ-lorraine.fr/hal-01515284</identifier>
<source>https://hal.univ-lorraine.fr/hal-01515284</source>
<source>Frontiers in Earth Science, Frontiers Media, 2015, 3, 〈10.3389/feart.2015.00081〉</source>
<identifier>DOI : 10.3389/feart.2015.00081</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.3389/feart.2015.00081</relation>
<language>en</language>
<subject>[CHIM.MATE] Chemical Sciences/Material chemistry</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>We present high resolution observations of microstructure and texture evolution during dynamic recrystallization (DRX) of ice polycrystals deformed in the laboratory at high temperature (≈0.98Tm). Ice possesses a significant viscoplastic anisotropy that induces strong strain heterogeneities, which result in an early occurrence of DRX mechanisms. It is therefore a model material to explore these mechanisms. High resolution c-axis measurements at sample scale by optical techniques and full crystallographic orientation measurements by cryo-Electron Back Scattering Diffraction (EBSD) provide a solid database for analyzing the relative impact of the macroscopic imposed stress vs. the local and internal stress fields on DRX mechanisms. Analysis of misorientation gradients in the EBSD data highlights a heterogeneous dislocation distribution, which is quantified by the Nye tensor estimation. Joint analyses of the dislocation density maps and microstructural observations highlight spatial correlation between high dislocation density sites and the onset of nucleation taking place by grain-boundary bulging, subgrain rotation or by the formation of kink-bands.</description>
<date>2015-12-17</date>
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