Ultrasonic TOFD Method for near Surface Defect Detection Using Longitudinal Secondary Wave

Chao Lu; Guo Chen; Xin Wang

doi:10.4028/www.scientific.net/AMM.157-158.7

Paper Titles

Preface and Committees

Free Vibration of Functionally Graded Material Beams in a Uniform Electric Field
p.3

Ultrasonic TOFD Method for near Surface Defect Detection Using Longitudinal Secondary Wave
p.7

Simultaneous Process Mean and Variance Monitoring Using Wavelet Transform and Probabilistic Neural Network
p.11

Development of Centrifuge for Multi-Parameter Combined Environmental Test
p.16

Development and Application of Activating Fluxes in TIG Welding
p.21

Structural Analysis and Optimization Design of the Frame of YC460LC-8 Excavator
p.27

Magnetorheological Materials Theory United in Energy
p.33

Experimental Investigation of Mechanical Characteristics of Parallel Polygonal Line Groove Multilayer Winding Drum
p.37

HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 157-158Ultrasonic TOFD Method for near Surface Defect...

Ultrasonic TOFD Method for near Surface Defect Detection Using Longitudinal Secondary Wave

Abstract:

Aim at the problem of near surface blind area in ultrasonic TOFD technique, a new testing mode combined to ultrasound time of flight diffraction-reflection(TOFDR) and the three-fold reflected(TOFDW) based on secondary longitudinal waves was put forward. Through analysis the transmission characteristics of TOFDR and TOFDW, the two modes of the detection principle were illustrated, and discussed the ability in near surface detection of the two methods. Finally through the detecting artificial defects detection, the signal and image characteristics and detection sensitivity under the modified detection mode were studied. The artificial defect with buried depth of 1mm can be effectively detected from the D-scan image by the combined TOFDR and TOFDW methods.

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Periodical:

Applied Mechanics and Materials (Volumes 157-158)

Pages:

7-10

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.157-158.7

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Online since:

February 2012

Authors:

Chao Lu, Guo Chen, Xin Wang

Keywords:

Defect Detection, Near Surface Blind Area, TOFDR, TOFDW, Ultrasonic TOFD

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