UNSPECIFIED (1998) Rayleigh wave dispersion on extruded aluminium. INSIGHT, 40 (9). pp. 632-634. ISSN 1354-2575

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Abstract

The experiment described in this paper measures the dispersion of a Rayleigh wave on an extruded aluminum bar. A pulsed Nd:YAG laser line source is used to generate a broadband Rayleigh wave which is detected using a modified Michelson interferometer with a high bandwidth (80 MHz). As the system is broadband changes in the form of the Rayleigh wave due to dispersion can be studied. The system is also entirely non-contact and non-destructive. Changes in the grain structure from surface to bulk due to extrusion can have very dramatic effects on the dispersion of the Rayleigh wave. Subtle surface effects that are often neglected when constructing test blocks have been demonstrated to be very important.

Item Type:	Journal Article
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Journal or Publication Title:	INSIGHT
Publisher:	BRITISH INST NON-DESTRUCTIVE TESTING
ISSN:	1354-2575
Date:	September 1998
Volume:	40
Number:	9
Number of Pages:	3
Page Range:	pp. 632-634
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/15396

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