Skip to Main content Skip to Navigation
Journal articles

Characterizing short-range vs. long-range spatial correlations in dislocation distributions

J. Chevy 1, 2 C. Fressengeas 3 M. Lebyodkin 3 V. Taupin 3 P. Bastie 4, 5 P. Duval 6
1 SIMaP - Science et Ingénierie des Matériaux et Procédés
2 LGGE - Laboratoire de glaciologie et géophysique de l'environnement
3 LPMM - Laboratoire de physique et mécanique des matériaux
4 LSP - Laboratoire de Spectrométrie Physique
5 ILL - Institut Laue-Langevin
6 EDGe
LGGE - Laboratoire de glaciologie et géophysique de l'environnement
Abstract : Hard X-ray diffraction experiments have provided evidence of a strongly heterogeneous distribution of dislocation densities along the axis of cylindrical ice single crystals oriented for basal slip in torsion creep. The dislocation arrangements showed a complex scale-invariant character, which was analyzed by means of statistical and multifractal techniques. A trend to decreasing autocorrelation of the dislocation distribution was observed as deformation proceeds. At low strain levels, long-range spatial correlations control the distribution, but short-range correlations in relation with cross-slip progressively prevail when strain increases. This trend was reproduced by a model based on field dislocation dynamics, a theory accounting for both long-range elastic interactions and short-range interactions through transport of dislocation densities.
Keywords : Dislocation dynamics Self-organization Spatial correlation Hard X-ray diffraction
Document type :
Journal articles
Complete list of metadatas
https://hal-insu.archives-ouvertes.fr/insu-00652947
Contributor : Pascale Talour <>
Submitted on : Friday, December 16, 2011 - 3:59:06 PM
Last modification on : Monday, November 23, 2020 - 10:38:04 AM

Identifiers

Collections

INSU | OSUG | LGGE | LIPHY | CNRS | UGA | INC-CNRS | UNIV-LORRAINE | SIMAP | IRSTEA | UNIV-SAVOIE | INRAE

Citation

J. Chevy, C. Fressengeas, M. Lebyodkin, V. Taupin, P. Bastie, et al.. Characterizing short-range vs. long-range spatial correlations in dislocation distributions. Acta Materialia, Elsevier, 2010, 58 (5), pp.1837-1849. ⟨10.1016/j.actamat.2009.11.027⟩. ⟨insu-00652947⟩

Export

BibTeX TEI DC DCterms EndNote

Share

Metrics

Record views

253