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

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

doi:10.1088/0957-0233/25/5/055902

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

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

Research output: Journal article publication › Journal article › Academic research › peer-review

77 Citations (Scopus)

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.

Original language	English
Article number	055902
Journal	Measurement Science and Technology
Volume	25
Issue number	5
DOIs	https://doi.org/10.1088/0957-0233/25/5/055902
Publication status	Published - 1 Jan 2014
Externally published	Yes

Keywords

grain orientation
laser ultrasound
material characterization
surface acoustic waves

ASJC Scopus subject areas

Instrumentation
Engineering (miscellaneous)
Applied Mathematics

More information

10.1088/0957-0233/25/5/055902

Cite this

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AU - Li, Wenqi

AU - Coulson, Jethro

AU - Clark, Matt

AU - Somekh, Michael Geoffrey

AU - Sharples, Steve D.

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Y1 - 2014/1/1

N2 - 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.

AB - 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.

KW - grain orientation

KW - laser ultrasound

KW - material characterization

KW - surface acoustic waves

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DO - 10.1088/0957-0233/25/5/055902

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JO - Measurement Science and Technology

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ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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