HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

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

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.
Document type :
Journal articles
Complete list of metadata

https://hal-insu.archives-ouvertes.fr/insu-00652947
Contributor : Pascale Talour Connect in order to contact the contributor
Submitted on : Friday, December 16, 2011 - 3:59:06 PM
Last modification on : Tuesday, March 8, 2022 - 3:16:09 PM

Identifiers

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⟩

Share

Metrics

Record views

100