Abstract
Since the introduction of commercially available, practical ultrasonic holographic systems several years ago, the majority of the activity has been focused on laboratory studies. Many of the holographically reconstructed images are of machined holes or objects of simple shape. The principal use of acoustical holography at Babcock and Wilcox has been to provide better characterization of natural defects detected using code-accepted NDE techniques. During the past several years, approximately 3 dozen natural defects have been examined by acoustical holography, Of these about 1/3 have been destructively analyzed. Normally acoustical holography provides dimensions of the reflecting surfaces that are accurate within one to two wavelengths of the true dimensions. In most cases, dimensions determined by holography slightly exceed the true values.
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© 1977 Springer Science+Business Media New York
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Holt, A.E., Lawrie, W.E. (1977). Ultrasonic Characterization of Defects. In: Kessler, L.W. (eds) Acoustical Holography. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-0653-6_40
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DOI: https://doi.org/10.1007/978-1-4757-0653-6_40
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4757-0655-0
Online ISBN: 978-1-4757-0653-6
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