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Time and Polarization Resolved Ultrasonic Testing of Materials

Published

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

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 19, 2024)
Created December 31, 1995, Updated October 12, 2021