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Non-destructive testing with surface acoustic waves using double-pulse TV holography

Cernadas Fraga, Daniel CarlosAutor UVIGO; Trillo Yáñez, María CristinaAutor UVIGO; Fernández Doval, Ángel ManuelAutor UVIGO; López Vázquez, José CarlosAutor UVIGO; Vázquez Dorrío, José BenitoAutor UVIGO; Fernández Fernández, José LuisAutor UVIGO; Perez-Martinez Perez-Amor, Mariano JesusAutor UVIGO
DATE: 2002
UNIVERSAL IDENTIFIER: http://hdl.handle.net/11093/397
EDITED VERSION: http://dx.doi.org/10.1088/0957-0233/13/4/303
UNESCO SUBJECT: 3311.11 Instrumentos Opticos ; 2209.07 Holografía ; 2201.09 Ultrasonidos
DOCUMENT TYPE: article

ABSTRACT

In this paper we present the visualization of the out-of-plane displacement fields produced by Rayleigh and Lamb waves on aluminium surfaces, using a double-pulse TV holography technique. This method presents several interesting characteristics, as a possible way of making whole-field remote measurements of instantaneous acoustic displacements, with good immunity from environmental perturbations. We also show examples where different surface and subsurface flaws have been detected, demonstrating the great potential of this technique for non-destructive testing in industrial applications.
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