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Proceedings Paper

Detection of hidden corrosion in aircraft structures using auralized ultrasonic data
Author(s): K. D. Polk; Glenn M. Light; A. E. Holt; Keith A. Bartels
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Paper Abstract

Detection of hidden corrosion on aircraft structures using conventional ultrasonic testing (UT) techniques is difficult because of the thin walls and topography of the corrosion. These characteristics require use of high-frequency, high-spatial-resolution transducers to attempt to detect backwall signal amplitude. It is usually difficult to visually discriminate backwall signals of thin wing structure from the normal ringdown of the initial pulse of the transducer (from the front-surface reflection). A technique was developed that increases the reliability of ultrasonic detection of hidden corrosion. The technique, called aural ultrasonics, involves complete transformation of the ultrasonic information into audible sounds. A trained inspector can listen to the sounds generated by the aural UT equipment and detect the presence of hidden corrosion. The aural ultrasonic technique, associated equipment, and evaluation on hidden-corrosion test samples will be discussed in this paper.

Paper Details

Date Published: 19 June 1995
PDF: 7 pages
Proc. SPIE 2459, Nondestructive Evaluation of Aging Maritime Applications, (19 June 1995); doi: 10.1117/12.212548
Show Author Affiliations
K. D. Polk, Southwest Research Institute (United States)
Glenn M. Light, Southwest Research Institute (United States)
A. E. Holt, Southwest Research Institute (United States)
Keith A. Bartels, Southwest Research Institute (United States)

Published in SPIE Proceedings Vol. 2459:
Nondestructive Evaluation of Aging Maritime Applications
Richard B. Mignogna, Editor(s)

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