Direct determination of elastic strains and dislocation densities in individual subgrains in deformation structures

Bo Jakobsen, H. F. Poulsen, U. Lienert, W. Pantleon

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

A novel synchrotron-based technique "high angular resolution 3DXRD" is presented in detail, and applied to the characterization of oxygen-free, high-conductivity copper at a tensile deformation of 2%. The position and shape in reciprocal space of 14 peaks originating from deeply embedded individual subgrains is reported. From this dataset the density of redundant dislocations in the individual subgrains is inferred to be below 12 × 1012 m-2 on average. It is found that the subgrains on average experience a reduction in strain of 0.9 × 10-4 with respect to the mean elastic strain of the full grain, a rather wide distribution of the strain difference between the subgrains (twice the standard deviation is 2.9 × 10-4), and a narrow internal strain distribution (upper limit is 2.4 × 10-4 full width at half maximum).

Original languageEnglish
JournalActa Materialia
Volume55
Issue number10
Pages (from-to)3421-3430
Number of pages10
ISSN1359-6454
DOIs
Publication statusPublished - 2007

Cite this

Jakobsen, Bo ; Poulsen, H. F. ; Lienert, U. ; Pantleon, W. / Direct determination of elastic strains and dislocation densities in individual subgrains in deformation structures. In: Acta Materialia. 2007 ; Vol. 55, No. 10. pp. 3421-3430.
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title = "Direct determination of elastic strains and dislocation densities in individual subgrains in deformation structures",
abstract = "A novel synchrotron-based technique {"}high angular resolution 3DXRD{"} is presented in detail, and applied to the characterization of oxygen-free, high-conductivity copper at a tensile deformation of 2{\%}. The position and shape in reciprocal space of 14 peaks originating from deeply embedded individual subgrains is reported. From this dataset the density of redundant dislocations in the individual subgrains is inferred to be below 12 × 1012 m-2 on average. It is found that the subgrains on average experience a reduction in strain of 0.9 × 10-4 with respect to the mean elastic strain of the full grain, a rather wide distribution of the strain difference between the subgrains (twice the standard deviation is 2.9 × 10-4), and a narrow internal strain distribution (upper limit is 2.4 × 10-4 full width at half maximum).",
author = "Bo Jakobsen and Poulsen, {H. F.} and U. Lienert and W. Pantleon",
year = "2007",
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journal = "Acta Materialia",
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Direct determination of elastic strains and dislocation densities in individual subgrains in deformation structures. / Jakobsen, Bo; Poulsen, H. F.; Lienert, U.; Pantleon, W.

In: Acta Materialia, Vol. 55, No. 10, 2007, p. 3421-3430.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Direct determination of elastic strains and dislocation densities in individual subgrains in deformation structures

AU - Jakobsen, Bo

AU - Poulsen, H. F.

AU - Lienert, U.

AU - Pantleon, W.

PY - 2007

Y1 - 2007

N2 - A novel synchrotron-based technique "high angular resolution 3DXRD" is presented in detail, and applied to the characterization of oxygen-free, high-conductivity copper at a tensile deformation of 2%. The position and shape in reciprocal space of 14 peaks originating from deeply embedded individual subgrains is reported. From this dataset the density of redundant dislocations in the individual subgrains is inferred to be below 12 × 1012 m-2 on average. It is found that the subgrains on average experience a reduction in strain of 0.9 × 10-4 with respect to the mean elastic strain of the full grain, a rather wide distribution of the strain difference between the subgrains (twice the standard deviation is 2.9 × 10-4), and a narrow internal strain distribution (upper limit is 2.4 × 10-4 full width at half maximum).

AB - A novel synchrotron-based technique "high angular resolution 3DXRD" is presented in detail, and applied to the characterization of oxygen-free, high-conductivity copper at a tensile deformation of 2%. The position and shape in reciprocal space of 14 peaks originating from deeply embedded individual subgrains is reported. From this dataset the density of redundant dislocations in the individual subgrains is inferred to be below 12 × 1012 m-2 on average. It is found that the subgrains on average experience a reduction in strain of 0.9 × 10-4 with respect to the mean elastic strain of the full grain, a rather wide distribution of the strain difference between the subgrains (twice the standard deviation is 2.9 × 10-4), and a narrow internal strain distribution (upper limit is 2.4 × 10-4 full width at half maximum).

U2 - doi:10.1016/j.actamat.2007.01.049

DO - doi:10.1016/j.actamat.2007.01.049

M3 - Journal article

VL - 55

SP - 3421

EP - 3430

JO - Acta Materialia

JF - Acta Materialia

SN - 1359-6454

IS - 10

ER -