Imperial College London

ProfessorMichaelLowe

Faculty of EngineeringDepartment of Mechanical Engineering

Head of Department of Mechanical Engineering
 
 
 
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Contact

 

+44 (0)20 7594 7000m.lowe Website

 
 
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Assistant

 

Ms Nina Hancock +44 (0)20 7594 7068

 
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Location

 

577DCity and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Lan:2018:10.1016/j.actamat.2018.08.037,
author = {Lan, B and Britton, TB and Jun, T-S and Gan, W and Hofmann, M and Dunne, F and Lowe, M},
doi = {10.1016/j.actamat.2018.08.037},
journal = {Acta Materialia},
pages = {384--394},
title = {Direct volumetric measurement of crystallographic texture using acoustic waves},
url = {http://dx.doi.org/10.1016/j.actamat.2018.08.037},
volume = {159},
year = {2018}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - 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.
AU - Lan,B
AU - Britton,TB
AU - Jun,T-S
AU - Gan,W
AU - Hofmann,M
AU - Dunne,F
AU - Lowe,M
DO - 10.1016/j.actamat.2018.08.037
EP - 394
PY - 2018///
SN - 1359-6454
SP - 384
TI - Direct volumetric measurement of crystallographic texture using acoustic waves
T2 - Acta Materialia
UR - http://dx.doi.org/10.1016/j.actamat.2018.08.037
UR - http://hdl.handle.net/10044/1/63775
VL - 159
ER -