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Spatially resolved acoustic spectroscopy for rapid imaging of material microstructure and grain orientation

Smith, Richard J.; Li, Wenqi; Coulson, Jethro; Clark, Matt; Somekh, Michael G.; Sharples, Steve D.

Authors

RICHARD SMITH richard.j.smith@nottingham.ac.uk
Assistant Professor in Optical and Electronic Engineering

WENQI LI Wenqi.Li@nottingham.ac.uk
Senior Research Fellow

Jethro Coulson

MATT CLARK matt.clark@nottingham.ac.uk
Professor of Applied Optics

Michael G. Somekh

Steve D. Sharples



Abstract

Measuring the grain structure of aerospace materials is very important to understand their mechanical properties and in-service performance. Spatially resolved acoustic spectroscopy is an acoustic technique utilizing surface acoustic waves to map the grain structure of a material. When combined with measurements in multiple acoustic propagation directions, the grain orientation can be obtained by fitting the velocity surface to a model. The new instrument presented here can take thousands of acoustic velocity measurements per second. The spatial and velocity resolution can be adjusted by simple modification to the system; this is discussed in detail by comparison of theoretical expectations with experimental data.

Citation

Smith, R. J., Li, W., Coulson, J., Clark, M., Somekh, M. G., & Sharples, S. D. (2014). Spatially resolved acoustic spectroscopy for rapid imaging of material microstructure and grain orientation. Measurement Science and Technology, 25(5), https://doi.org/10.1088/0957-0233/25/5/055902

Journal Article Type Article
Acceptance Date Jan 17, 2014
Publication Date May 14, 2014
Deposit Date Apr 8, 2014
Publicly Available Date May 14, 2014
Journal Measurement Science and Technology
Print ISSN 0957-0233
Electronic ISSN 1361-6501
Publisher IOP Publishing
Peer Reviewed Peer Reviewed
Volume 25
Issue 5
DOI https://doi.org/10.1088/0957-0233/25/5/055902
Keywords surface acoustic waves, material characterization, laser ultrasound, grain orientation
Public URL http://eprints.nottingham.ac.uk/id/eprint/2817
Publisher URL http://iopscience.iop.org/0957-0233/25/5/055902
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0





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