Fatigue Damage Evaluation by Diffraction Contrast Tomography Using Ultra-Bright Synchrotron Radiation

Fatigue Damage Evaluation by Diffraction Contrast Tomography Using Ultra-Bright Synchrotron Radiation

A three-dimensional grain mapping technique for polycrystalline materials, called X-ray diffraction contrast tomography (DCT), was developed at SPring-8, which is the brightest synchrotron radiation facility in Japan. The developed technique was applied to an austenitic stainless steel. The shape an...

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Bibliographic Details
Main Authors: Yoshikazu Nakai, Daiki Shiozawa, Naoya Asakawa, Kenji Nonaka, Shoichi Kikuchi
Format: Article
Language:English
Published: MDPI AG 2018-05-01
Series:Proceedings
Subjects:
synchrotron radiation
diffraction contrast tomography
total misorientation
dislocation density
fatigue damage
crack initiation
Online Access:http://www.mdpi.com/2504-3900/2/8/380
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spelling doaj-2977c27628e24fc09e6914b076be28ba2020-11-24T20:40:43ZengMDPI AGProceedings2504-39002018-05-012838010.3390/ICEM18-05210ICEM18-05210Fatigue Damage Evaluation by Diffraction Contrast Tomography Using Ultra-Bright Synchrotron RadiationYoshikazu Nakai0Daiki Shiozawa1Naoya Asakawa2Kenji Nonaka3Shoichi Kikuchi4Department of Mechanical Engineering, Kobe University, Kobe 657-8501, JapanDepartment of Mechanical Engineering, Kobe University, Kobe 657-8501, JapanDepartment of Mechanical Engineering, Kobe University, Kobe 657-8501, JapanDepartment of Mechanical Engineering, Kobe University, Kobe 657-8501, JapanDepartment of Mechanical Engineering, Shizuoka University, Hamamatsu 432-8561, JapanA three-dimensional grain mapping technique for polycrystalline materials, called X-ray diffraction contrast tomography (DCT), was developed at SPring-8, which is the brightest synchrotron radiation facility in Japan. The developed technique was applied to an austenitic stainless steel. The shape and location of grains could be determined by DCT using the apparatus in a beam line of SPring-8. To evaluate the dislocation structure in fatigue, the total misorientation of individual grains was measured by DCT. The average value of the total misorientation over one sample was increased with the number of cycles. In a grain, the change of the total misorientation was largest for the primary slip plane. The maximum change of the total misorientation in fatigue was larger for planes with larger Schmid factor, and the first fatigue crack initiation was occurred in a grain, which had the greatest change of the total misorientation.http://www.mdpi.com/2504-3900/2/8/380synchrotron radiationdiffraction contrast tomographytotal misorientationdislocation densityfatigue damagecrack initiation
collection DOAJ
language English
format Article
sources DOAJ
author Yoshikazu Nakai
Daiki Shiozawa
Naoya Asakawa
Kenji Nonaka
Shoichi Kikuchi
spellingShingle Yoshikazu Nakai
Daiki Shiozawa
Naoya Asakawa
Kenji Nonaka
Shoichi Kikuchi
Fatigue Damage Evaluation by Diffraction Contrast Tomography Using Ultra-Bright Synchrotron Radiation
Proceedings
synchrotron radiation
diffraction contrast tomography
total misorientation
dislocation density
fatigue damage
crack initiation
author_facet Yoshikazu Nakai
Daiki Shiozawa
Naoya Asakawa
Kenji Nonaka
Shoichi Kikuchi
author_sort Yoshikazu Nakai
title Fatigue Damage Evaluation by Diffraction Contrast Tomography Using Ultra-Bright Synchrotron Radiation
title_short Fatigue Damage Evaluation by Diffraction Contrast Tomography Using Ultra-Bright Synchrotron Radiation
title_full Fatigue Damage Evaluation by Diffraction Contrast Tomography Using Ultra-Bright Synchrotron Radiation
title_fullStr Fatigue Damage Evaluation by Diffraction Contrast Tomography Using Ultra-Bright Synchrotron Radiation
title_full_unstemmed Fatigue Damage Evaluation by Diffraction Contrast Tomography Using Ultra-Bright Synchrotron Radiation
title_sort fatigue damage evaluation by diffraction contrast tomography using ultra-bright synchrotron radiation
publisher MDPI AG
series Proceedings
issn 2504-3900
publishDate 2018-05-01
description A three-dimensional grain mapping technique for polycrystalline materials, called X-ray diffraction contrast tomography (DCT), was developed at SPring-8, which is the brightest synchrotron radiation facility in Japan. The developed technique was applied to an austenitic stainless steel. The shape and location of grains could be determined by DCT using the apparatus in a beam line of SPring-8. To evaluate the dislocation structure in fatigue, the total misorientation of individual grains was measured by DCT. The average value of the total misorientation over one sample was increased with the number of cycles. In a grain, the change of the total misorientation was largest for the primary slip plane. The maximum change of the total misorientation in fatigue was larger for planes with larger Schmid factor, and the first fatigue crack initiation was occurred in a grain, which had the greatest change of the total misorientation.
topic synchrotron radiation
diffraction contrast tomography
total misorientation
dislocation density
fatigue damage
crack initiation
url http://www.mdpi.com/2504-3900/2/8/380
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AT daikishiozawa fatiguedamageevaluationbydiffractioncontrasttomographyusingultrabrightsynchrotronradiation
AT naoyaasakawa fatiguedamageevaluationbydiffractioncontrasttomographyusingultrabrightsynchrotronradiation
AT kenjinonaka fatiguedamageevaluationbydiffractioncontrasttomographyusingultrabrightsynchrotronradiation
AT shoichikikuchi fatiguedamageevaluationbydiffractioncontrasttomographyusingultrabrightsynchrotronradiation
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