A Non-Contact Guided Wave Technique for Defect Thinning Monitoring

Ik Keun Park; Yong Kwon Kim; Tae Hyung Kim; Yong Sang Cho

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

Paper Titles

Identification of Voids and Cracks by Ultrasonic Technique
p.665

A Study on the Effect of Gap Width on Residual Stresses of Laser-Welded Dissimilar Joints
p.669

Advanced Technologies for Estimation of Nonlinear Ultrasonic Parameter
p.673

Quantitative Evaluation of Strain Induced Martensite in STS 316L Stainless Steel
p.677

A Non-Contact Guided Wave Technique for Defect Thinning Monitoring
p.681

A Study on the Nondestructive Evaluation of Material Degradation
p.685

Determination of Thermal Conductivity of Amorphous Silicon Thin Films via Non-Contacting Optical Probing
p.689

Characterization of the Fracture Process of a Plate-Type Piezoelectric Composite Actuator under a Bending Load by Acoustic Emission Monitoring
p.693

Nondestructive Evaluation on Thermal Shock Damage of Ceramics
p.697

HomeKey Engineering MaterialsKey Engineering Materials Vols. 326-328A Non-Contact Guided Wave Technique for Defect...

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.

You might also be interested in these eBooks

Experimental Mechanics in Nano and Biotechnology

View Preview

Info:

Periodical:

Key Engineering Materials (Volumes 326-328)

Pages:

681-684

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.326-328.681

Citation:

Cite this paper

Online since:

December 2006

Authors:

Ik Keun Park, Yong Kwon Kim, Tae Hyung Kim, Yong Sang Cho

Keywords:

Defect Thinning, EMAT, Guided Wave, Non Contact Technique

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

References

[1] J.L. Rose and L.E. Soley: Mater. Evaluation, Vol. 58-9 (2000), p.1080.

Google Scholar

[2] I.K. Park, Y.K. Kim, Y.H. Cho, Y.S. Ahn, Y.S. Cho: J. KSNT Vol. 24-2 (2004), p.142.

Google Scholar

[3] W. Zhu, J.L. Rose, J.N. Barshinger, and V.S. Agarwala: Nondestructive Evaluation Vol. 10-4 (1998), p-21.

Google Scholar

[4] D. Tuzzo and F. Lanza di Scalea: Res. Nondestructive Evaluation Vol. 13 (2001), p.61.

Google Scholar

[5] J.L. Rose: Ultrasonic Waves in Solid Media (Cambridge University Press, United Kingdom 1999).

Google Scholar

[6] M. Hirao and H. Ogi: EMATs for Science and Industry Noncontacting Ultrasonic Measurements (Kluwer Academic Publisher, 2003) 1. 55 1. 6 1. 65 1. 7 1. 75 1. 8 1. 85 1. 9 1. 95 2 2. 05 2. 1 2. 15 2. 2 0. 5.

[1] 1. 5.

[2] 2. 5.

[3] 3. 5.

[4] Group velocity Defect free.

Google Scholar

[3] [5] [7] [10] [12] [15] [17] [20] Defect free.

Google Scholar

[3] [5] [7] [10] [12] λ = 7. 6 � λ = 4. 06 � f·d [�·�] Group velocity[km/s] 0. 8 0. 82 0. 84 0. 86 0. 88 0. 9 0. 92 0. 94 0. 96 0. 98 1 -0. 015 -0. 01 -0. 005.

Google Scholar

0. 005 0. 01 0. 015 0. 02.

Google Scholar

[7] �F�QHVV�� @� 7UDYH��7�PH��VHF@� ��7�� 7�� 7�� 7 &� &� &� &� &�.

Google Scholar