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Reconstructing intragranular strain fields in polycrystalline materials from scanning 3DXRD data

Henningsson, N. Axel LU ; Hall, Stephen A. LU ; Wright, Jonathan P. and Hektor, Johan LU (2020) In Journal of Applied Crystallography 53. p.314-325
Abstract

Two methods for reconstructing intragranular strain fields are developed for scanning three-dimensional X-ray diffraction (3DXRD). The methods are compared with a third approach where voxels are reconstructed independently of their neighbours [Hayashi, Setoyama & Seno (2017). Mater. Sci. Forum, 905, 157-164]. The 3D strain field of a tin grain, located within a sample of approximately 70 grains, is analysed and compared across reconstruction methods. Implicit assumptions of sub-problem independence, made in the independent voxel reconstruction method, are demonstrated to introduce bias and reduce reconstruction accuracy. It is verified that the two proposed methods remedy these problems by taking the spatial properties of the... (More)

Two methods for reconstructing intragranular strain fields are developed for scanning three-dimensional X-ray diffraction (3DXRD). The methods are compared with a third approach where voxels are reconstructed independently of their neighbours [Hayashi, Setoyama & Seno (2017). Mater. Sci. Forum, 905, 157-164]. The 3D strain field of a tin grain, located within a sample of approximately 70 grains, is analysed and compared across reconstruction methods. Implicit assumptions of sub-problem independence, made in the independent voxel reconstruction method, are demonstrated to introduce bias and reduce reconstruction accuracy. It is verified that the two proposed methods remedy these problems by taking the spatial properties of the inverse problem into account. Improvements in reconstruction quality achieved by the two proposed methods are further supported by reconstructions using synthetic diffraction data.

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author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
3DXRD, intragranular strain, tomography, X-ray diffraction
in
Journal of Applied Crystallography
volume
53
pages
12 pages
publisher
International Union of Crystallography
external identifiers
  • pmid:32280319
  • scopus:85082962873
ISSN
0021-8898
DOI
10.1107/S1600576720001016
language
English
LU publication?
yes
id
ab4d3710-297f-4313-886d-eb9b85b0003f
date added to LUP
2020-04-29 12:22:19
date last changed
2024-03-20 08:26:47
@article{ab4d3710-297f-4313-886d-eb9b85b0003f,
  abstract     = {{<p>Two methods for reconstructing intragranular strain fields are developed for scanning three-dimensional X-ray diffraction (3DXRD). The methods are compared with a third approach where voxels are reconstructed independently of their neighbours [Hayashi, Setoyama &amp; Seno (2017). Mater. Sci. Forum, 905, 157-164]. The 3D strain field of a tin grain, located within a sample of approximately 70 grains, is analysed and compared across reconstruction methods. Implicit assumptions of sub-problem independence, made in the independent voxel reconstruction method, are demonstrated to introduce bias and reduce reconstruction accuracy. It is verified that the two proposed methods remedy these problems by taking the spatial properties of the inverse problem into account. Improvements in reconstruction quality achieved by the two proposed methods are further supported by reconstructions using synthetic diffraction data.</p>}},
  author       = {{Henningsson, N. Axel and Hall, Stephen A. and Wright, Jonathan P. and Hektor, Johan}},
  issn         = {{0021-8898}},
  keywords     = {{3DXRD; intragranular strain; tomography; X-ray diffraction}},
  language     = {{eng}},
  pages        = {{314--325}},
  publisher    = {{International Union of Crystallography}},
  series       = {{Journal of Applied Crystallography}},
  title        = {{Reconstructing intragranular strain fields in polycrystalline materials from scanning 3DXRD data}},
  url          = {{http://dx.doi.org/10.1107/S1600576720001016}},
  doi          = {{10.1107/S1600576720001016}},
  volume       = {{53}},
  year         = {{2020}},
}