Journal articles
The heterogeneous nature of slip in ice single crystals deformed under torsion
Abstract : Ice single crystals were deformed under torsion and dislocation arrangements were analyzed by synchrotron topography at ESRF (European Synchrotron Radiation Facility). Profile analysis of the topographs revealed the scale-invariant character of the dislocation arrangement with long-range correlations. Dislocation density gradients are shown to be slightly anti-correlated as the intensity profile is similar to an anti-persistent random walk-like signal. This analysis reveals the influence of internal stresses on dislocation arrangement up to the sample scale. Similar observations in reversed torsion experiments, together with strong hardening behaviour, allow a mechanism of cross-slip of basal dislocations on prismatic planes to be suggested for interpretation of local dislocation interaction behaviour.
https://hal-insu.archives-ouvertes.fr/insu-00375732
Contributor : Aurore Gayraud <>
Submitted on : Thursday, April 16, 2009 - 8:41:14 AM
Last modification on : Friday, September 25, 2020 - 9:16:02 AM
Contributor : Aurore Gayraud <>
Submitted on : Thursday, April 16, 2009 - 8:41:14 AM
Last modification on : Friday, September 25, 2020 - 9:16:02 AM
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