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Refinements for Bragg coherent X-ray diffraction imaging: electron backscatter diffraction alignment and strain field computation

Bragg coherent X-ray diffraction imaging (BCDI) allows the 3D measurement of lattice strain along the scattering vector for specific microcrystals. If at least three linearly independent reflections are measured, the 3D variation of the full lattice strain tensor within the microcrystal can be recov...

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Autores principales: Yang, David, Lapington, Mark T., He, Guanze, Song, Kay, Zhang, Minyi, Barker, Clara, Harder, Ross J., Cha, Wonsuk, Liu, Wenjun, Phillips, Nicholas W., Hofmann, Felix
Formato: Online Artículo Texto
Lenguaje:English
Publicado: International Union of Crystallography 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9533756/
https://www.ncbi.nlm.nih.gov/pubmed/36249491
http://dx.doi.org/10.1107/S1600576722007646
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author Yang, David
Lapington, Mark T.
He, Guanze
Song, Kay
Zhang, Minyi
Barker, Clara
Harder, Ross J.
Cha, Wonsuk
Liu, Wenjun
Phillips, Nicholas W.
Hofmann, Felix
author_facet Yang, David
Lapington, Mark T.
He, Guanze
Song, Kay
Zhang, Minyi
Barker, Clara
Harder, Ross J.
Cha, Wonsuk
Liu, Wenjun
Phillips, Nicholas W.
Hofmann, Felix
author_sort Yang, David
collection PubMed
description Bragg coherent X-ray diffraction imaging (BCDI) allows the 3D measurement of lattice strain along the scattering vector for specific microcrystals. If at least three linearly independent reflections are measured, the 3D variation of the full lattice strain tensor within the microcrystal can be recovered. However, this requires knowledge of the crystal orientation, which is typically attained via estimates based on crystal geometry or synchrotron microbeam Laue diffraction measurements. Presented here is an alternative method to determine the crystal orientation for BCDI measurements using electron backscatter diffraction (EBSD) to align Fe–Ni and Co–Fe alloy microcrystals on three different substrates. The orientation matrix is calculated from EBSD Euler angles and compared with the orientation determined using microbeam Laue diffraction. The average angular mismatch between the orientation matrices is less than ∼6°, which is reasonable for the search for Bragg reflections. The use of an orientation matrix derived from EBSD is demonstrated to align and measure five reflections for a single Fe–Ni microcrystal via multi-reflection BCDI. Using this data set, a refined strain field computation based on the gradient of the complex exponential of the phase is developed. This approach is shown to increase accuracy, especially in the presence of dislocations. The results demonstrate the feasibility of using EBSD to pre-align BCDI samples and the application of more efficient approaches to determine the full lattice strain tensor with greater accuracy.
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spelling pubmed-95337562022-10-13 Refinements for Bragg coherent X-ray diffraction imaging: electron backscatter diffraction alignment and strain field computation Yang, David Lapington, Mark T. He, Guanze Song, Kay Zhang, Minyi Barker, Clara Harder, Ross J. Cha, Wonsuk Liu, Wenjun Phillips, Nicholas W. Hofmann, Felix J Appl Crystallogr Research Papers Bragg coherent X-ray diffraction imaging (BCDI) allows the 3D measurement of lattice strain along the scattering vector for specific microcrystals. If at least three linearly independent reflections are measured, the 3D variation of the full lattice strain tensor within the microcrystal can be recovered. However, this requires knowledge of the crystal orientation, which is typically attained via estimates based on crystal geometry or synchrotron microbeam Laue diffraction measurements. Presented here is an alternative method to determine the crystal orientation for BCDI measurements using electron backscatter diffraction (EBSD) to align Fe–Ni and Co–Fe alloy microcrystals on three different substrates. The orientation matrix is calculated from EBSD Euler angles and compared with the orientation determined using microbeam Laue diffraction. The average angular mismatch between the orientation matrices is less than ∼6°, which is reasonable for the search for Bragg reflections. The use of an orientation matrix derived from EBSD is demonstrated to align and measure five reflections for a single Fe–Ni microcrystal via multi-reflection BCDI. Using this data set, a refined strain field computation based on the gradient of the complex exponential of the phase is developed. This approach is shown to increase accuracy, especially in the presence of dislocations. The results demonstrate the feasibility of using EBSD to pre-align BCDI samples and the application of more efficient approaches to determine the full lattice strain tensor with greater accuracy. International Union of Crystallography 2022-09-06 /pmc/articles/PMC9533756/ /pubmed/36249491 http://dx.doi.org/10.1107/S1600576722007646 Text en © David Yang et al. 2022 https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
spellingShingle Research Papers
Yang, David
Lapington, Mark T.
He, Guanze
Song, Kay
Zhang, Minyi
Barker, Clara
Harder, Ross J.
Cha, Wonsuk
Liu, Wenjun
Phillips, Nicholas W.
Hofmann, Felix
Refinements for Bragg coherent X-ray diffraction imaging: electron backscatter diffraction alignment and strain field computation
title Refinements for Bragg coherent X-ray diffraction imaging: electron backscatter diffraction alignment and strain field computation
title_full Refinements for Bragg coherent X-ray diffraction imaging: electron backscatter diffraction alignment and strain field computation
title_fullStr Refinements for Bragg coherent X-ray diffraction imaging: electron backscatter diffraction alignment and strain field computation
title_full_unstemmed Refinements for Bragg coherent X-ray diffraction imaging: electron backscatter diffraction alignment and strain field computation
title_short Refinements for Bragg coherent X-ray diffraction imaging: electron backscatter diffraction alignment and strain field computation
title_sort refinements for bragg coherent x-ray diffraction imaging: electron backscatter diffraction alignment and strain field computation
topic Research Papers
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9533756/
https://www.ncbi.nlm.nih.gov/pubmed/36249491
http://dx.doi.org/10.1107/S1600576722007646
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