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Ultrasonic characterization of effective elastic constants and texture in aluminium correlated with EBSD

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Essex, S. D., Potter, M. D. G., Dobedoe, R. S. and Dixon, S. (2008) Ultrasonic characterization of effective elastic constants and texture in aluminium correlated with EBSD. AIP Conference Proceedings (No.975). pp. 1176-1183. doi:10.1063/1.2902566

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Abstract

Electron Backscatter Diffraction (EBSD) is a microscopic technique that provides detailed crystallographic orientation information for given samples. It enables the quantitative calculation and visualization of important microstructural properties such as grain size, aspect ratio and the average grain orientation of the aggregate, commonly known as the Orientation Distribution Function (ODF). In order to validate an ultrasonic technique to quantitatively describe texture we are correlating ultrasonic velocity measurements with results from EBSD. The velocity variations as a function of angle from the Rolling Direction in sheet samples are dependent on such quantities measurable by the EBSD technique. We describe here a modified technique to extrapolate the three independent Orientation Distribution Coefficients (ODCs) W-400, W-420 and W-440 for cubic structures from the Bunge-Euler angle data determined through EBSD scans as a description of texture within the sample. EBSD results, taken from through-thickness scans to eliminate the errors that arise with surface-to-bulk inhomogeneity, for rolled aluminium sheets are discussed and compared to the ODCs obtained using an ultrasonic EMAT-EMAT S-0 Lamb wave velocity measurement system.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Engineering
Faculty of Science > Physics
Library of Congress Subject Headings (LCSH): Electrons -- Backscattering, Electrons -- Diffraction, Aluminium, Texture (Crystallography), Electromagnets, Ultrasonics
Journal or Publication Title: AIP Conference Proceedings
Publisher: American Institute of Physics
ISBN: 978-0-7354-0494-6
ISSN: 0094-243X
Editor: Thompson, DO and Chimenti, DE
Official Date: 2008
Dates:
DateEvent
2008Published
Number: No.975
Number of Pages: 8
Page Range: pp. 1176-1183
DOI: 10.1063/1.2902566
Status: Peer Reviewed
Publication Status: Published
Description:

Conference proceedings of 34th Annual Review of Progress in Quantitative Nondestructive Evaluation, Golden, CO, 22-27 Jul 2007

Conference Paper Type: Paper
Type of Event: Conference

Data sourced from Thomson Reuters' Web of Knowledge

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