Reconstructing intragranular strain fields in polycrystalline materials from scanning 3DXRD data
(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.
(Less)
- author
- Henningsson, N. Axel LU ; Hall, Stephen A. LU ; Wright, Jonathan P. and Hektor, Johan LU
- organization
- publishing date
- 2020
- 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 & 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}}, }