Time and Polarization Resolved Ultrasonic Testing of Materials

Published

January 1, 1996

Author(s)

Gerald V. Blessing, D Xiang, Nelson N. Hsu

Abstract

We have developed a transducer which allows the benefits of Line Focus Beam (LFB) acoustic microscopy to be realized over large areas, using a conventional pulser-receiver. Experimental evidence is presented to show that the transducer is correctly modeled in detail by Green?s function theory, and that all relevant wave speeds can also be predicted using a much simpler geometrical ray model. Data obtained by simply rotating the transducer a fixed distance above the specimen are presented using grey-scale plots which establish the ease with which anisotropy can be revealed. Finally, a grey-scale plot of rotational-scan data recast in terms of velocity is shown to demonstrate the simultaneous detection of both surface and pseudo-surface waves in the same crystallographic orientation of a silicon specimen.

Proceedings Title

Proceedings of the First US-Japan Symposium on Advances in NDT

Conference Location

, USA

Conference Title

American Society for Nondestructive Testing

Pub Type

Conferences

Keywords

Nondestructive evaluation, Ultrasonics

Citation

Blessing, G. , Xiang, D. and Hsu, N. (1996), Time and Polarization Resolved Ultrasonic Testing of Materials, Proceedings of the First US-Japan Symposium on Advances in NDT, , USA (Accessed April 20, 2024)