@inproceedings{70f39299fb984395afbe4ebc94cafd36,
title = "DETECTION OF SURFACE-BREAKING CRACKS IN THE ACOUSTIC MICROSCOPE.",
abstract = "We have shown acoustic micrographs which demonstrate that the scanning acoustic microscope (SAM) can detect cracks orders of magnitude smaller than the wavelength of the incident sound. These micrographs show the network of cracks very clearly and yet large areas of the specimen may be imaged. The sensitive detection of cracks is due to excitation of Rayleigh waves along the surface of the specimen. A theory which although approximate suggests the important points of the crack detection mechanism. We have made some calculations to assess the magnitude of the Rayleigh wave contribution to the V(z) curve, the results of which suggest that cracks will be detected with greater sensitivity when the ratio of the density of the specimen to the density of the coupling fluid is comparatively low. It seems possible then that the sensitivity of the SAM for detecting cracks may be still further improved by a suitable choice of coupling fluid.",
author = "Soumekh, \{M. G.\} and Briggs, \{G. A.D.\} and C. Ilett",
year = "1984",
doi = "10.1007/978-1-4613-2779-0\_11",
language = "English",
isbn = "0306417170",
series = "Acoustical Imaging: Proceedings of the International Symposium",
publisher = "Plenum Press",
pages = "119--128",
booktitle = "Acoustical Imaging",
}