Evaluation of a Novel Eddy-Current Probe for Detecting Cracks Inside and at the Edges of Holes
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Begun in 1973, the Review of Progress in Quantitative Nondestructive Evaluation (QNDE) is the premier international NDE meeting designed to provide an interface between research and early engineering through the presentation of current ideas and results focused on facilitating a rapid transfer to engineering development.
This site provides free, public access to papers presented at the annual QNDE conference between 1983 and 1999, and abstracts for papers presented at the conference since 2001.
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Abstract
Preliminary studies performed during a previous investigation at SRI showed that a modified floppy-disk tape head operating at 100 kHz is a very sensitive crack detector. For example, tests on 0.25-in.-long fatigue cracks in aluminum produced signals an order of magnitude larger than those obtained using a commercial 100-kHz coil probe. The floppy-disk probe contains ferrite material, but its construction is different from other ferrite-containing eddy-current probes.