Edwards, R. S. (Rachel S.), Jian, X., Fan, Y. and Dixon, S.. (2005) Signal enhancement of the in-plane and out-of-plane Rayleigh wave components. Applied Physics Letters, Vol.87 (No.19). p. 194104. ISSN 0003-6951

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Abstract

Several groups have reported an enhancement of the ultrasonic Rayleigh wave when scanning close to a surface-breaking defect in a metal sample. This enhancement may be explained as an interference effect where the waves passing directly between source and receiver interfere with those waves reflected back from the defect. We present finite element models of the predicted enhancement when approaching a defect, along with experiments performed using electromagnetic acoustic transducers sensitive to either in-plane or out-of-plane motion. A larger enhancement of the in-plane motion than the out-of-plane motion is observed and can be explained by considering ultrasonic reflections and mode conversion at the defect.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science > Engineering Faculty of Science > Physics
Library of Congress Subject Headings (LCSH):	Aluminum, Finite element method, Transducers, Rayleigh waves, Electromagnetism
Journal or Publication Title:	Applied Physics Letters
Publisher:	American Institute of Physics
ISSN:	0003-6951
Date:	1 November 2005
Volume:	Vol.87
Number:	No.19
Page Range:	p. 194104
Identification Number:	10.1063/1.2128058
Status:	Peer Reviewed
Access rights to Published version:	Open Access
Funder:	Engineering and Physical Sciences Research Council (EPSRC)
Grant number:	GR/S24435/01 (EPSRC)
References:	# Z. Yan and P. B. Nagy, Rev. Prog. Quant. Nondestr. Eval. 22, 204 (2003). # A. K. Kromine, P. A. Fomitchov, S. Krishnaswamy, and J. D. Achenbach, Mater. Eval. 58, 173 (2000). # S. Boonsang and R. J. Dewhurst, Appl. Phys. Lett. 82, 3348 (2003). # S. Boonsang and R. J. Dewhurst, Ultrasonics 43, 512 (2005). # R. S. Edwards, S. Dixon, and X. Jian, J. Phys. D 37, 2291 (2004). # R. S. Edwards, S. Dixon, and X. Jian, Rev. Prog. Quant. Nondestr. Eval. 24B, 1568 (2004). # S. Dixon, C. Edwards, and S. B. Palmer, J. Phys. D 35, 816 (2002). # H.M. Frost, Physical Acoustics XIV (Academic, New York, 1979), p. 179. # S. B. Palmer and S. Dixon, Insight 45, 211 (2003). # I.A. Viktorov, Rayleigh and Lamb Waves (Plenum, New York, 1967). # X. Jian, S. Dixon, N. Guo, R.S. Edwards, S.T. Lock, and Y. Fan (unpublished). # R. B. Thompson, IEEE Trans. Sonics Ultrason. 20, 340 (1973).
URI:	http://wrap.warwick.ac.uk/id/eprint/980

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