Rapid electron backscatter diffraction mapping: Painting by numbers

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Rapid electron backscatter diffraction mapping : Painting by numbers. / Tong, Vivian; Knowles, Alexander; Dye, David; Britton, T. Benjamin.

In: Materials Characterization, Vol. 147, 01.2019, p. 271-279.

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Tong, Vivian ; Knowles, Alexander ; Dye, David ; Britton, T. Benjamin. / Rapid electron backscatter diffraction mapping : Painting by numbers. In: Materials Characterization. 2019 ; Vol. 147. pp. 271-279.

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@article{a41401a6b308478da2d2eb6ab428b4fa,
title = "Rapid electron backscatter diffraction mapping: Painting by numbers",
abstract = "Microstructure characterisation has been greatly enhanced through the use of electron backscatter diffraction (EBSD), where rich maps are generated through analysis of the crystal phase and orientation in the scanning electron microscope (SEM). Conventional EBSD analysis involves raster scanning of the electron beam and serial analysis of each diffraction pattern in turn. For grain shape, crystallographic texture, and microstructure analysis this can be inefficient. In this work, we present Rapid EBSD, a data fusion approach combining forescatter electron (FSE) imaging with static sparse sampling of EBSD patterns. We segment the FSE image into regions of similar colour (i.e. phase and crystal orientation) and then collect representative EBSD data for each segmented region. This enables microstructural assessment to be performed at the spatial resolution of the (fast) FSE imaging whilst including orientation and phase information from EBSD analysis of representative points. We demonstrate the Rapid EBSD technique on samples of a cobalt based superalloy and a strained dual phase titanium alloy, comparing the results with conventional analysis. Rapid EBSD is advantageous for assessing grain size distributions in time-limited experiments.",
keywords = "Microstructure, electron imaging, sparse sampling",
author = "Vivian Tong and Alexander Knowles and David Dye and Britton, {T. Benjamin}",
year = "2019",
month = jan,
doi = "10.1016/j.matchar.2018.11.014",
language = "English",
volume = "147",
pages = "271--279",
journal = "Materials Characterization",
issn = "1044-5803",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Rapid electron backscatter diffraction mapping

T2 - Painting by numbers

AU - Tong, Vivian

AU - Knowles, Alexander

AU - Dye, David

AU - Britton, T. Benjamin

PY - 2019/1

Y1 - 2019/1

N2 - Microstructure characterisation has been greatly enhanced through the use of electron backscatter diffraction (EBSD), where rich maps are generated through analysis of the crystal phase and orientation in the scanning electron microscope (SEM). Conventional EBSD analysis involves raster scanning of the electron beam and serial analysis of each diffraction pattern in turn. For grain shape, crystallographic texture, and microstructure analysis this can be inefficient. In this work, we present Rapid EBSD, a data fusion approach combining forescatter electron (FSE) imaging with static sparse sampling of EBSD patterns. We segment the FSE image into regions of similar colour (i.e. phase and crystal orientation) and then collect representative EBSD data for each segmented region. This enables microstructural assessment to be performed at the spatial resolution of the (fast) FSE imaging whilst including orientation and phase information from EBSD analysis of representative points. We demonstrate the Rapid EBSD technique on samples of a cobalt based superalloy and a strained dual phase titanium alloy, comparing the results with conventional analysis. Rapid EBSD is advantageous for assessing grain size distributions in time-limited experiments.

AB - Microstructure characterisation has been greatly enhanced through the use of electron backscatter diffraction (EBSD), where rich maps are generated through analysis of the crystal phase and orientation in the scanning electron microscope (SEM). Conventional EBSD analysis involves raster scanning of the electron beam and serial analysis of each diffraction pattern in turn. For grain shape, crystallographic texture, and microstructure analysis this can be inefficient. In this work, we present Rapid EBSD, a data fusion approach combining forescatter electron (FSE) imaging with static sparse sampling of EBSD patterns. We segment the FSE image into regions of similar colour (i.e. phase and crystal orientation) and then collect representative EBSD data for each segmented region. This enables microstructural assessment to be performed at the spatial resolution of the (fast) FSE imaging whilst including orientation and phase information from EBSD analysis of representative points. We demonstrate the Rapid EBSD technique on samples of a cobalt based superalloy and a strained dual phase titanium alloy, comparing the results with conventional analysis. Rapid EBSD is advantageous for assessing grain size distributions in time-limited experiments.

KW - Microstructure

KW - electron imaging

KW - sparse sampling

U2 - 10.1016/j.matchar.2018.11.014

DO - 10.1016/j.matchar.2018.11.014

M3 - Article

VL - 147

SP - 271

EP - 279

JO - Materials Characterization

JF - Materials Characterization

SN - 1044-5803

ER -