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Grain size measurement by EBSD in complex hot deformed metal alloy microstructures

The measurement of grain size by EBSD has been studied to enable representative quantification of the microstructure of hot deformed metal alloys with a wide grain size distributions. Variation in measured grain size as a function of EBSD step size and noise reduction techniques has been assessed. I... Full description

Journal Title: Journal of Microscopy September 2007, Vol.227(3), pp.298-308
Main Author: Mingard, K. P.
Other Authors: Roebuck, B. , Bennett, E. G. , Thomas, M. , Wynne, B. P. , Palmiere, E. J.
Format: Electronic Article Electronic Article
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ID: ISSN: 0022-2720 ; E-ISSN: 1365-2818 ; DOI: 10.1111/j.1365-2818.2007.01814.x
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recordid: wj10.1111/j.1365-2818.2007.01814.x
title: Grain size measurement by EBSD in complex hot deformed metal alloy microstructures
format: Article
creator:
  • Mingard, K. P.
  • Roebuck, B.
  • Bennett, E. G.
  • Thomas, M.
  • Wynne, B. P.
  • Palmiere, E. J.
subjects:
  • Deformation
  • Electron Backscatter Diffraction
  • Grain Size
  • Microstructure
  • Step Size
ispartof: Journal of Microscopy, September 2007, Vol.227(3), pp.298-308
description: The measurement of grain size by EBSD has been studied to enable representative quantification of the microstructure of hot deformed metal alloys with a wide grain size distributions. Variation in measured grain size as a function of EBSD step size and noise reduction techniques has been assessed. Increasing the EBSD step size from 5% to 20% of the approximate mean grain size results in a change in calculated arithmetic mean grain size of approximately 15% and standard noise reduction techniques can produce a further change in reported size of up to 20%. The distribution of measured grain size is found not to be log‐normal, with a long tail of very small sizes in agreement with a computer simulation of linear intercept and areal grain size measurements through randomly oriented grains. Comparison of EBSD with optical measurements of grain size on the same samples shows that, because of the ability of EBSD to distinguish twins and resolve much smaller grains a difference of up to 50% in measured grain size results.
language:
source:
identifier: ISSN: 0022-2720 ; E-ISSN: 1365-2818 ; DOI: 10.1111/j.1365-2818.2007.01814.x
fulltext: fulltext
issn:
  • 0022-2720
  • 00222720
  • 1365-2818
  • 13652818
url: Link


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titleGrain size measurement by EBSD in complex hot deformed metal alloy microstructures
creatorMingard, K. P. ; Roebuck, B. ; Bennett, E. G. ; Thomas, M. ; Wynne, B. P. ; Palmiere, E. J.
ispartofJournal of Microscopy, September 2007, Vol.227(3), pp.298-308
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subjectDeformation ; Electron Backscatter Diffraction ; Grain Size ; Microstructure ; Step Size
descriptionThe measurement of grain size by EBSD has been studied to enable representative quantification of the microstructure of hot deformed metal alloys with a wide grain size distributions. Variation in measured grain size as a function of EBSD step size and noise reduction techniques has been assessed. Increasing the EBSD step size from 5% to 20% of the approximate mean grain size results in a change in calculated arithmetic mean grain size of approximately 15% and standard noise reduction techniques can produce a further change in reported size of up to 20%. The distribution of measured grain size is found not to be log‐normal, with a long tail of very small sizes in agreement with a computer simulation of linear intercept and areal grain size measurements through randomly oriented grains. Comparison of EBSD with optical measurements of grain size on the same samples shows that, because of the ability of EBSD to distinguish twins and resolve much smaller grains a difference of up to 50% in measured grain size results.
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titleGrain size measurement by EBSD in complex hot deformed metal alloy microstructures
descriptionThe measurement of grain size by EBSD has been studied to enable representative quantification of the microstructure of hot deformed metal alloys with a wide grain size distributions. Variation in measured grain size as a function of EBSD step size and noise reduction techniques has been assessed. Increasing the EBSD step size from 5% to 20% of the approximate mean grain size results in a change in calculated arithmetic mean grain size of approximately 15% and standard noise reduction techniques can produce a further change in reported size of up to 20%. The distribution of measured grain size is found not to be log‐normal, with a long tail of very small sizes in agreement with a computer simulation of linear intercept and areal grain size measurements through randomly oriented grains. Comparison of EBSD with optical measurements of grain size on the same samples shows that, because of the ability of EBSD to distinguish twins and resolve much smaller grains a difference of up to 50% in measured grain size results.
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abstractThe measurement of grain size by EBSD has been studied to enable representative quantification of the microstructure of hot deformed metal alloys with a wide grain size distributions. Variation in measured grain size as a function of EBSD step size and noise reduction techniques has been assessed. Increasing the EBSD step size from 5% to 20% of the approximate mean grain size results in a change in calculated arithmetic mean grain size of approximately 15% and standard noise reduction techniques can produce a further change in reported size of up to 20%. The distribution of measured grain size is found not to be log‐normal, with a long tail of very small sizes in agreement with a computer simulation of linear intercept and areal grain size measurements through randomly oriented grains. Comparison of EBSD with optical measurements of grain size on the same samples shows that, because of the ability of EBSD to distinguish twins and resolve much smaller grains a difference of up to 50% in measured grain size results.
copOxford, UK
pubBlackwell Publishing Ltd
doi10.1111/j.1365-2818.2007.01814.x
pages298-308
date2007-09