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Thickness measurements of sheets and plates with horizontally polarized guided plate waves -SH-modes- and electromagnetic ultrasonic EMUS-transducers

: Repplinger, W.; Salzburger, H.J.

4th European Conference on Non-Destructive Testing '87. Proceedings. Vol.4
Oxford: Pergamon Press, 1988
European Conference on Non-Destructive Testing <4, 1987, London>
Fraunhofer IZFP ()
EMUS; guided wave; SH-mode; sound velocity; steel sheet; tickness measurement; ultrasound

A new developed self-calibrating ultrasonic technique for the thickness measurement of high alloyed steel sheets with a strong variation of the sound velocity is described. It is based on the features of guided SH-Modes, namely no dispersion of the lowest mode SS sub O and dispersion of all other modes and transduction of the ultrasonic waves by EMUS-transducers. (IZFP)