A Non-Contact Guided Wave Technique for Defect Thinning Monitoring

Abstract:

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This paper capitalizes on recent advances in the area of non-contact ultrasonic guided wave techniques. The present technique provides a decent method for nondestructive testing of defect thinning simulating a hidden corrosion or FAC(Flow Accelerated Corrosion) in a thin aluminum plate. The proposed approach is based on using EMAT(Electro-magnetic Acoustic Transducer) to generate guided waves and detect the wall thinning without any coupling. Interesting features in the dispersive behavior of selected guided modes are used for the detection of plate thinning. It is shown that mode cut-off measurement allows us to monitor a defect thinning level while a group velocity change can be used to quantify the thinning depth.

Info:

Periodical:

Key Engineering Materials (Volumes 326-328)

Edited by:

Soon-Bok Lee and Yun-Jae Kim

Pages:

681-684

DOI:

10.4028/www.scientific.net/KEM.326-328.681

Citation:

I. K. Park et al., "A Non-Contact Guided Wave Technique for Defect Thinning Monitoring", Key Engineering Materials, Vols. 326-328, pp. 681-684, 2006

Online since:

December 2006

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Price:

$35.00

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