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Multiple wavemode scanning for near and far-side defect characterisation
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Xiang, L. and Edwards, R. S. (Rachel S.) (2020) Multiple wavemode scanning for near and far-side defect characterisation. Journal of Nondestructive Evaluation, 39 (1). 9. doi:10.1007/s10921-019-0651-0 ISSN 0195-9298.
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Official URL: http://dx.doi.org/10.1007/s10921-019-0651-0
Abstract
The combination of ultrasonic inspections using different wavemodes can give more information than is available with single mode inspection. In this work, the response of shear and Rayleigh waves to surface-breaking defects propagating on the near-side and far-side of a sample is investigated. The directivity of shear waves generated by a racetrack coil electromagnetic acoustic transducer (EMAT) is identified and used to set an ideal separation for a pair of transmit-receive EMATs. Defects are indicated by a reduction in the transmitted Rayleigh wave amplitude, and by blocking of the shear wave. Used together, these can identify features in the bulk wave behaviour which are due to near-face surface-breaking defects, and give a full picture of both surfaces. By using a combination of the two wavemodes, the angle of propagation and length of any near-side defects can additionally be identified. A scanning method for samples is proposed.
Item Type: | Journal Article | ||||||
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Subjects: | Q Science > QC Physics | ||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||
Library of Congress Subject Headings (LCSH): | Ultrasonics -- Research, Electroacoustic transducers, Surfaces (Technology) -- Analysis | ||||||
Journal or Publication Title: | Journal of Nondestructive Evaluation | ||||||
Publisher: | Springer New York LLC | ||||||
ISSN: | 0195-9298 | ||||||
Official Date: | 8 January 2020 | ||||||
Dates: |
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Volume: | 39 | ||||||
Number: | 1 | ||||||
Article Number: | 9 | ||||||
DOI: | 10.1007/s10921-019-0651-0 | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||
Date of first compliant deposit: | 16 January 2020 | ||||||
Date of first compliant Open Access: | 29 January 2020 |
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