Detection of hidden corrosion in aircraft structures using auralized ultrasonic data

K. D. Polk; Glenn M. Light; A. E. Holt; Keith A. Bartels

doi:10.1117/12.212548

19 June 1995 Detection of hidden corrosion in aircraft structures using auralized ultrasonic data

K. D. Polk, Glenn M. Light, A. E. Holt, Keith A. Bartels

Proceedings Volume 2459, Nondestructive Evaluation of Aging Maritime Applications; (1995) https://doi.org/10.1117/12.212548
Event: Nondestructive Evaluation of Aging Infrastructure, 1995, Oakland, CA, United States

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.

Citation Download Citation

K. D. Polk, Glenn M. Light, A. E. Holt, and Keith A. Bartels "Detection of hidden corrosion in aircraft structures using auralized ultrasonic data", Proc. SPIE 2459, Nondestructive Evaluation of Aging Maritime Applications, (19 June 1995); https://doi.org/10.1117/12.212548

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