Analysis of Dynamic Recrystallization of Ice from EBSD Orientation Mapping - Université de Lorraine Access content directly
Journal Articles Frontiers in Earth Science Year : 2015

Analysis of Dynamic Recrystallization of Ice from EBSD Orientation Mapping

Abstract

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.
Fichier principal
Vignette du fichier
feart-03-00081.pdf (6.62 Mo) Télécharger le fichier
Origin Publisher files allowed on an open archive

Dates and versions

hal-01515284 , version 1 (05-01-2021)

Licence

Identifiers

Cite

Maurine Montagnat, Thomas Chauve, Fabrice Barou, Andrea Tommasi, Benoît Beausir, et al.. Analysis of Dynamic Recrystallization of Ice from EBSD Orientation Mapping. Frontiers in Earth Science, 2015, 3, ⟨10.3389/feart.2015.00081⟩. ⟨hal-01515284⟩
3164 View
106 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More