Paper Title:
A Non-Contact Guided Wave Technique for Defect Thinning Monitoring
  Abstract

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, Y. K. Kim, T. H. Kim, Y. S. Cho, "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
$32.00
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