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Title: Reflector Selection for the Indexing of Electron Backscatter Diffraction Patterns

Abstract

Abstract We propose a new methodology for ranking the reflectors used in traditional Hough-based indexing of electron backscatter diffraction (EBSD) patterns. Instead of kinematic X-ray or electron structure factors (Fhkl) currently utilized, we propose the integrated Kikuchi band intensity parameter (βhkl) based on integrated dynamical electron backscatter intensities. The proposed parameter is compared with the traditional kinematical intensity, $$I_{hkl}^{{\rm kin}} $$, as well as the average Hough transform peak intensity, $$I_{hkl}^{{\rm HSP}} $$ and used to index EBSD patterns for a number of different material systems of varying unit cell complexities including nickel, silicon, rutile, and forsterite. For elemental structures, βhkl closely follows the kinematical ranking. However, significant ranking differences arise for more complex unit cells, with the βhkl parameter showing a better correlation with the integrated Hough intensities. Lastly, Hough-based indexing of a simulated forsterite data set showed an appreciable improvement in the median confidence index (0.15 to 0.35) whenβhklis used instead of $$I_{hkl}^{{\rm kin}} $$ for ranking the reflectors.

Authors:
 [1];  [2]; ORCiD logo [3]
  1. EDAX, Draper, UT (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Carnegie Mellon Univ., Pittsburgh, PA (United States)
  3. Carnegie Mellon Univ., Pittsburgh, PA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1575868
Report Number(s):
LLNL-JRNL-762497
Journal ID: ISSN 1431-9276; 951235
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Microscopy and Microanalysis
Additional Journal Information:
Journal Volume: 25; Journal Issue: 3; Journal ID: ISSN 1431-9276
Publisher:
Microscopy Society of America (MSA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; EBSD; Electron Backscatter Diffraction; Dynamical Simulations; Indexing

Citation Formats

Wright, Stuart I., Singh, Saransh, and De Graef, Marc. Reflector Selection for the Indexing of Electron Backscatter Diffraction Patterns. United States: N. p., 2019. Web. doi:10.1017/S1431927619000333.
Wright, Stuart I., Singh, Saransh, & De Graef, Marc. Reflector Selection for the Indexing of Electron Backscatter Diffraction Patterns. United States. https://doi.org/10.1017/S1431927619000333
Wright, Stuart I., Singh, Saransh, and De Graef, Marc. Wed . "Reflector Selection for the Indexing of Electron Backscatter Diffraction Patterns". United States. https://doi.org/10.1017/S1431927619000333. https://www.osti.gov/servlets/purl/1575868.
@article{osti_1575868,
title = {Reflector Selection for the Indexing of Electron Backscatter Diffraction Patterns},
author = {Wright, Stuart I. and Singh, Saransh and De Graef, Marc},
abstractNote = {Abstract We propose a new methodology for ranking the reflectors used in traditional Hough-based indexing of electron backscatter diffraction (EBSD) patterns. Instead of kinematic X-ray or electron structure factors (Fhkl) currently utilized, we propose the integrated Kikuchi band intensity parameter (βhkl) based on integrated dynamical electron backscatter intensities. The proposed parameter is compared with the traditional kinematical intensity, $I_{hkl}^{{\rm kin}} $, as well as the average Hough transform peak intensity, $I_{hkl}^{{\rm HSP}} $ and used to index EBSD patterns for a number of different material systems of varying unit cell complexities including nickel, silicon, rutile, and forsterite. For elemental structures, βhkl closely follows the kinematical ranking. However, significant ranking differences arise for more complex unit cells, with the βhkl parameter showing a better correlation with the integrated Hough intensities. Lastly, Hough-based indexing of a simulated forsterite data set showed an appreciable improvement in the median confidence index (0.15 to 0.35) whenβhklis used instead of $I_{hkl}^{{\rm kin}} $ for ranking the reflectors.},
doi = {10.1017/S1431927619000333},
journal = {Microscopy and Microanalysis},
number = 3,
volume = 25,
place = {United States},
year = {Wed Mar 27 00:00:00 EDT 2019},
month = {Wed Mar 27 00:00:00 EDT 2019}
}

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