Analysis of Polycrystalline Microstructure of AlMgSc Alloy Observed by 3D EBSD

Authors

  • Jaromír Kopeček Institute of Physics of the CAS, Department of Functional Materials, Na Slovance 2, 182 00 Prague 8
  • Jakub Staněk Department of Mathematics Education, Faculty of Mathematics and Physics, Charles University, 18675 Prague
  • Stanislav Habr Institute of Physics of the CAS, Department of Functional Materials, Na Slovance 2, 182 00 Prague 8
  • Filip Seitl Department of Probability and Mathematical Statistics, Faculty of Mathematics and Physics, Charles University, 18675 Prague
  • Lukas Petrich Institute of Stochastics, Faculty of Mathematics and Economics, Ulm University, 89069 Ulm
  • Volker Schmidt Institute of Stochastics, Faculty of Mathematics and Economics, Ulm University, 89069 Ulm
  • Viktor Beneš Department of Probability and Mathematical Statistics, Faculty of Mathematics and Physics, Charles University, 18675 Prague

DOI:

https://doi.org/10.5566/ias.2224

Keywords:

3D EBSD, grain boundaries, misorientation, polycrystalline microstructure, statistical image analysis

Abstract

The aim of this paper is to evaluate an ambitious imaging experiment and to contribute to the methodology of statistical inference of the three-dimensional microstructure of polycrystalline materials. The microstructure of the considered Al-3Mg-0.2Sc alloy was investigated by three-dimensional electron backscattered diffraction (3D-EBSD), i.e., tomographic imaging with xenon plasma focused ion beam (Xe-FIB) alongside EBSD. The samples were subjected to severe plastic deformations by equal channel angular pressing (ECAP) and annealed subsequently prior to the mapping. First we compared the misorientation level needed for a reliable segmentation of grains distinguishing between conventional evaluation of two-dimensional cuts and the 3D data set. Then, using methods of descriptive spatial statistics, various morphological characteristics of a large number of grains were analyzed, as well as the crystallographic texture and the spatial distribution of grain boundaries. According to the results stated so far in the literature, an even microstructure was expected, nevertheless local inhomogeneities in grains and grain boundaries with regard to their size, texture and spatial distribution were observed and justified.

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Published

2020-04-13

Issue

Vol. 39 No. 1 (2020)

Section

Original Research Paper

License

Copyright (c) 2020 Image Analysis & Stereology

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

How to Cite

Kopeček, J., Staněk, J., Habr, S., Seitl, F., Petrich, L., Schmidt, V., & Beneš, V. (2020). Analysis of Polycrystalline Microstructure of AlMgSc Alloy Observed by 3D EBSD. Image Analysis and Stereology, 39(1), 1-11. https://doi.org/10.5566/ias.2224

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