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Eddy-current crack detection at frequencies approaching electrical resonance
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Hughes, R. (Robert) and Dixon, S. (2014) Eddy-current crack detection at frequencies approaching electrical resonance. In: 40th review of progress in quantitative nondestructive evaluation : Incorporating the 10th international conference on Barkhausen noise and micromagnetic testing, Baltimore, Maryland, USA, 21–26 July 2013. Published in: AIP Conference Proceedings, 1581 pp. 1366-1373. ISBN 978735412118. doi:10.1063/1.4864980 ISSN 0094-243X.
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Official URL: http://dx.doi.org/10.1063/1.4864980
Abstract
The effect of operating an absolute eddy-current (EC) probe at frequencies around its electrical resonance was investigated. A defect signal enhancement phenomenon was observed and characterised. Experimental tests were performed on notch defects in typical aerospace superalloys. An absolute mode EC probe was operated by sweeping through a range of frequencies, in the MHz range, encompassing the electrical resonance of the system. Resonance decoupling above defects results in a signal-to-noise ratio (SNR) peak, within a band of frequencies approaching resonance, of up to 3.7 times that measured at 1MHz. This near electrical resonance signal enhancement (NERSE) phenomenon poses the possibility for a simple operational approach method for improving the sensitivity of conventional eddy-current testing.
| Item Type: | Conference Item (Paper) | ||||
|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||
| Journal or Publication Title: | AIP Conference Proceedings | ||||
| Publisher: | American Institute of Physics | ||||
| ISBN: | 978735412118 | ||||
| ISSN: | 0094-243X | ||||
| Editor: | Chimenti, Dale E. and Bond, Leonard J. and Thompson, Donald O. | ||||
| Official Date: | 18 February 2014 | ||||
| Dates: |
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| Volume: | 1581 | ||||
| Page Range: | pp. 1366-1373 | ||||
| DOI: | 10.1063/1.4864980 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Conference Paper Type: | Paper | ||||
| Title of Event: | 40th review of progress in quantitative nondestructive evaluation : Incorporating the 10th international conference on Barkhausen noise and micromagnetic testing | ||||
| Type of Event: | Conference | ||||
| Location of Event: | Baltimore, Maryland, USA | ||||
| Date(s) of Event: | 21–26 July 2013 |
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