Characterization of internal fatigue cracks in aluminum alloys by simulation of phase contrast tomography

Synchrotron Radiation Computed Tomography (SRCT) allows a better detection of fatigue cracks in metals than laboratory CT due to the existence of phase contrast. However the presence in reconstructed images of fringes at the edges of objects generated by Fresnel diffraction makes it difficult to ide...

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Autores principales: Xiao, Ce, Létang, Jean Michel, Buffière, Jean-Yves
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2022
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8993829/
https://www.ncbi.nlm.nih.gov/pubmed/35395858
http://dx.doi.org/10.1038/s41598-022-09811-8
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author Xiao, Ce
Létang, Jean Michel
Buffière, Jean-Yves
author_facet Xiao, Ce
Létang, Jean Michel
Buffière, Jean-Yves
author_sort Xiao, Ce
collection PubMed
description Synchrotron Radiation Computed Tomography (SRCT) allows a better detection of fatigue cracks in metals than laboratory CT due to the existence of phase contrast. However the presence in reconstructed images of fringes at the edges of objects generated by Fresnel diffraction makes it difficult to identify and analyze the cracks quantitatively. Simulations of phase contrast synchrotron tomography images containing cracks with different sizes and shapes are obtained by using GATE software. Analyzing the simulation results, firstly, we confirmed that the bright parts with strong contrast in SRCT image are streak artifacts; secondly, we found that the gray scale values within the cracks in SRCT images are related to the crack size; these simulation results are used to analyse SRCT images of internal fatigue cracks in a cast Al alloy, providing a clearer visualisation of damage.
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spelling pubmed-89938292022-04-11 Characterization of internal fatigue cracks in aluminum alloys by simulation of phase contrast tomography Xiao, Ce Létang, Jean Michel Buffière, Jean-Yves Sci Rep Article Synchrotron Radiation Computed Tomography (SRCT) allows a better detection of fatigue cracks in metals than laboratory CT due to the existence of phase contrast. However the presence in reconstructed images of fringes at the edges of objects generated by Fresnel diffraction makes it difficult to identify and analyze the cracks quantitatively. Simulations of phase contrast synchrotron tomography images containing cracks with different sizes and shapes are obtained by using GATE software. Analyzing the simulation results, firstly, we confirmed that the bright parts with strong contrast in SRCT image are streak artifacts; secondly, we found that the gray scale values within the cracks in SRCT images are related to the crack size; these simulation results are used to analyse SRCT images of internal fatigue cracks in a cast Al alloy, providing a clearer visualisation of damage. Nature Publishing Group UK 2022-04-08 /pmc/articles/PMC8993829/ /pubmed/35395858 http://dx.doi.org/10.1038/s41598-022-09811-8 Text en © The Author(s) 2022, corrected publication 2023 https://creativecommons.org/licenses/by/4.0/Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Xiao, Ce
Létang, Jean Michel
Buffière, Jean-Yves
Characterization of internal fatigue cracks in aluminum alloys by simulation of phase contrast tomography
title Characterization of internal fatigue cracks in aluminum alloys by simulation of phase contrast tomography
title_full Characterization of internal fatigue cracks in aluminum alloys by simulation of phase contrast tomography
title_fullStr Characterization of internal fatigue cracks in aluminum alloys by simulation of phase contrast tomography
title_full_unstemmed Characterization of internal fatigue cracks in aluminum alloys by simulation of phase contrast tomography
title_short Characterization of internal fatigue cracks in aluminum alloys by simulation of phase contrast tomography
title_sort characterization of internal fatigue cracks in aluminum alloys by simulation of phase contrast tomography
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8993829/
https://www.ncbi.nlm.nih.gov/pubmed/35395858
http://dx.doi.org/10.1038/s41598-022-09811-8
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AT buffierejeanyves characterizationofinternalfatiguecracksinaluminumalloysbysimulationofphasecontrasttomography

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