3-D α colony characterisation and prior-β grain reconstruction of a lamellar Ti-6Al-4V specimen using near-field high energy x-ray diffraction microscopy

Wielewski, E. , Menasche, D. B., Callahan, P. G. and Suter, R. (2015) 3-D α colony characterisation and prior-β grain reconstruction of a lamellar Ti-6Al-4V specimen using near-field high energy x-ray diffraction microscopy. Journal of Applied Crystallography, 48(4), pp. 1165-1171. (doi:10.1107/S1600576715011139)

[img]
Preview
Text
107250.pdf - Accepted Version

2MB

Abstract

Near-field high energy X-ray diffraction microscopy (nf-HEDM) has been used to characterize the 3-D crystallographic orientation field of the hexagonal close-packed (hcp) α phase in a bulk Ti-6Al-4V specimen with a lamellar (β-annealed) microstructure. These data have been segmented using a 3-D misorientation-based grain finding algorithm, providing unprecedented information about the complex 3-D morphologies and spatial misorientation distributions of the transformed α lamellae colonies. A 3-D Burgers orientation relationship-based flood fill algorithm has been implemented to reconstruct the morphologies and crystallographic orientations of the high temperature body centred cubic (bcc) prior-β grains. The combination of these data has been used to gain understanding of the role of the prior-β grain structure on the formation of specific morphologies and spatial misorientation distributions observed in the transformed α colony structures. It is hoped that this understanding can be used to develop transformation structures optimized for specific applications and to produce more physically realistic synthetic microstructures for use in simulations.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Wielewski, Dr Euan
Authors: Wielewski, E., Menasche, D. B., Callahan, P. G., and Suter, R.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Journal of Applied Crystallography
Publisher:International Union of Crystallography
ISSN:0021-8898
ISSN (Online):1600-5767
Copyright Holders:Copyright © 2015 International Union of Crystallography
First Published:First published in Journal of Applied Crystallography 48(4):1165-1171
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher.
Data DOI:10.5525/gla.researchdata.163

University Staff: Request a correction | Enlighten Editors: Update this record