MacLaren, I. , Frutos-Myro, E., Zeltmann, S. and Ophus, C. (2024) A method for crystallographic mapping of an alpha-beta titanium alloy with nanometre resolution using scanning precession electron diffraction and open-source software libraries. Journal of Microscopy, (doi: 10.1111/jmi.13275) (Early Online Publication)
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Abstract
An approach for the crystallographic mapping of two-phase alloys on the nanoscale using a combination of scanned precession electron diffraction and open-source python libraries is introduced in this paper. This method is demonstrated using the example of a two-phase α/β titanium alloy. The data were recorded using a direct electron detector to collect the patterns, and recently developed algorithms to perform automated indexing and analyse the crystallography from the results. Very high-quality mapping is achieved at a 3 nm step size. The results show the expected Burgers orientation relationships between the α laths and β matrix, as well as the expected misorientations between α laths. A minor issue was found that one area was affected by 180° ambiguities in indexing occur due to this area being aligned too close to a zone axis of the α with twofold projection symmetry (not present in 3D) in the zero-order Laue Zone, and this should be avoided in data acquisition in the future. Nevertheless, this study demonstrates a good workflow for the analysis of nanocrystalline two- or multi-phase materials, which will be of widespread use in analysing two-phase titanium and other systems and how they evolve as a function of thermomechanical treatments.
| Item Type: | Articles |
|---|---|
| Status: | Early Online Publication |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Frutos Myro, Mr Enrique and MacLaren, Dr Ian |
| Authors: | MacLaren, I., Frutos-Myro, E., Zeltmann, S., and Ophus, C. |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Journal Name: | Journal of Microscopy |
| Publisher: | Wiley |
| ISSN: | 0022-2720 |
| ISSN (Online): | 1365-2818 |
| Published Online: | 14 February 2024 |
| Copyright Holders: | Copyright © 2024 The Authors |
| First Published: | First published in Journal of Microscopy 2024 |
| Publisher Policy: | Reproduced under a Creative Commons licence |
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