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

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

Cernadas Fraga, Daniel Carlos; Trillo Yáñez, María Cristina; Fernández Doval, Ángel Manuel; López Vázquez, José Carlos; Vázquez Dorrío, José Benito; Fernández Fernández, José Luis; Perez-Martinez Perez-Amor, Mariano Jesus
 
DATE : 2002
UNIVERSAL IDENTIFIER : http://hdl.handle.net/11093/397
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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Calidad So9001