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.

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. © 2014 IOP Publishing Ltd.

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), Article 055902. https://doi.org/10.1088/0957-0233/25/5/055902

• Journal Article Type: Article
• Acceptance Date: Jan 17, 2014
• Online Publication Date: Mar 14, 2014
• Publication Date: Mar 14, 2014
• Deposit Date: Apr 8, 2014
• Publicly Available Date: Apr 8, 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
• Article Number: 055902
• DOI: https://doi.org/10.1088/0957-0233/25/5/055902
• Keywords: surface acoustic waves, material characterization, laser ultrasound, grain orientation
• Public URL: https://nottingham-repository.worktribe.com/output/728848
• Publisher URL: http://iopscience.iop.org/0957-0233/25/5/055902
• Contract Date: Apr 8, 2014