NASA NTRS · 19930034673
Imaging flaws in thin metal plates using a magneto-optic device
Abstract
An account is given of the capabilities of the magnetooptic/eddy-current imager (MEI) apparatus in the case of aging aircraft structure-type flaws in 2024-T3 Al alloy plates. Attention is given to images of cyclically grown fatigue cracks from rivetted joints in fabricated lap-joint structures, electrical discharge machining notches, and corrosion spots. Although conventional eddy-current methods could have been used, the speed and ease of MEI's use in these tests is unmatched by such means. Results are displayed in real time as a test piece is scanned, furnishing easily interpreted flaw images.
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Wincheski, B., Prabhu, D. R., Namkung, M., Birt, E. A.. 1992-01-01. Imaging flaws in thin metal plates using a magneto-optic device. https://ntrs.nasa.gov/citations/19930034673
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