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Direct volumetric measurement of crystallographic texture using acoustic waves

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Title: Direct volumetric measurement of crystallographic texture using acoustic waves
Authors: Lan, B
Britton, TB
Jun, T-S
Gan, W
Hofmann, M
Dunne, F
Lowe, M
Item Type: Journal Article
Abstract: Crystallographic texture in polycrystalline materials is often developed as preferred orientation distribution of grains during thermo-mechanical processes. Texture dominates many macroscopic physical properties and reflects the histories of structural evolution, hence its measurement and control are vital for performance optimisation and deformation history interogation in engineering and geological materials. However, exploitations of texture are hampered by state-of-the-art characterisation techniques, none of which can routinely deliver the desirable non-destructive, volumetric measurements, especially at larger lengthscales. Here we report a direct and general methodology retrieving important lower-truncation-order texture and phase information from acoustic (compressional elastic) wave speed measurements in different directions through the material volume (avoiding the need for forward modelling). We demonstrate its deployment with ultrasound in the laboratory, where the results from seven representative samples are successfully validated against measurements performed using neutron diffraction. The acoustic method we have developed includes both fundamental wave propagation and texture inversion theories which are free from diffraction limits, they are arbitrarily scalable in dimension, and can be rapidly deployed to measure the texture of large objects. This opens up volumetric texture characterisation capabilities in the areas of material science and beyond, for both scientific and industrial applications.
Issue Date: 15-Oct-2018
Date of Acceptance: 21-Aug-2018
URI: http://hdl.handle.net/10044/1/63775
DOI: https://dx.doi.org/10.1016/j.actamat.2018.08.037
ISSN: 1359-6454
Publisher: Elsevier
Start Page: 384
End Page: 394
Journal / Book Title: Acta Materialia
Volume: 159
Copyright Statement: © 2018 Acta Materialia Inc. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)
Sponsor/Funder: Engineering & Physical Science Research Council (EPSRC)
EPSRC
Royal Academy Of Engineering
Royal Academy Of Engineering
Rolls-Royce Plc
Funder's Grant Number: EP/K034332/1
EP/K034332/1
RF/129
MMRE_P54661
5200041317
Keywords: Science & Technology
Technology
Materials Science, Multidisciplinary
Metallurgy & Metallurgical Engineering
Materials Science
Crytallographic texture
Volumetric measurement
Ultrasound
Non-destructive evaluation
VELOCITY-MEASUREMENTS
ELASTIC-CONSTANTS
STRESS
TITANIUM
MICROSTRUCTURE
ORIENTATION
PROPAGATION
ANISOTROPY
TI-6AL-4V
INVERSION
0912 Materials Engineering
0913 Mechanical Engineering
Materials
Publication Status: Published
Online Publication Date: 2018-08-25
Appears in Collections:Faculty of Engineering
Mechanical Engineering
Materials
Faculty of Natural Sciences



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