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Title: Scaling of the spacing of deformation induced dislocation boundaries

Abstract

Methods for determining the distribution of spacings between near-planar dislocation boundaries are discussed. Subsequently, distributions of spacings for these boundaries have been determined for both single crystal and polycrystal samples. Misorientations across the extended planar dislocation boundaries were also measured for the single crystal samples. The probability density distribution for spacings exhibits a scaling behavior of nearly identical form to that seen for the probability density distribution of misorientation angles across these boundaries. The scaling behavior of the spacing distributions persists over a very wide strain range ({epsilon}{sub vM} = 0.2-{epsilon}{sub vM} = 4.5) for different materials and deformation conditions. The scaling behavior of the boundary spacings can be accounted for by simple geometric models allowing for either formation or coalescence of these walls.

Authors:
;
Publication Date:
Research Org.:
Sandia National Lab., Livermore, CA (US)
Sponsoring Org.:
USDOE
OSTI Identifier:
20075941
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Journal Article
Journal Name:
Acta Materialia
Additional Journal Information:
Journal Volume: 48; Journal Issue: 8; Other Information: PBD: 11 May 2000; Journal ID: ISSN 1359-6454
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; MICROSTRUCTURE; DEFORMATION; METALS; ALLOYS; MATHEMATICAL MODELS; DISLOCATIONS; SPATIAL DISTRIBUTION; STRAINS; TRANSMISSION ELECTRON MICROSCOPY

Citation Formats

Godfrey, A., and Hughes, D.A. Scaling of the spacing of deformation induced dislocation boundaries. United States: N. p., 2000. Web. doi:10.1016/S1359-6454(99)00474-7.
Godfrey, A., & Hughes, D.A. Scaling of the spacing of deformation induced dislocation boundaries. United States. doi:10.1016/S1359-6454(99)00474-7.
Godfrey, A., and Hughes, D.A. Thu . "Scaling of the spacing of deformation induced dislocation boundaries". United States. doi:10.1016/S1359-6454(99)00474-7.
@article{osti_20075941,
title = {Scaling of the spacing of deformation induced dislocation boundaries},
author = {Godfrey, A. and Hughes, D.A.},
abstractNote = {Methods for determining the distribution of spacings between near-planar dislocation boundaries are discussed. Subsequently, distributions of spacings for these boundaries have been determined for both single crystal and polycrystal samples. Misorientations across the extended planar dislocation boundaries were also measured for the single crystal samples. The probability density distribution for spacings exhibits a scaling behavior of nearly identical form to that seen for the probability density distribution of misorientation angles across these boundaries. The scaling behavior of the spacing distributions persists over a very wide strain range ({epsilon}{sub vM} = 0.2-{epsilon}{sub vM} = 4.5) for different materials and deformation conditions. The scaling behavior of the boundary spacings can be accounted for by simple geometric models allowing for either formation or coalescence of these walls.},
doi = {10.1016/S1359-6454(99)00474-7},
journal = {Acta Materialia},
issn = {1359-6454},
number = 8,
volume = 48,
place = {United States},
year = {2000},
month = {5}
}