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Non-contact ultrasonic detection of angled surface defects
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Dutton, B. (Ben), Clough, A. R., Rosli, M. H. and Edwards, R. S. (Rachel S.) (2011) Non-contact ultrasonic detection of angled surface defects. NDT & E International, Vol.44 (No.4). pp. 353-360. doi:10.1016/j.ndteint.2011.02.001 ISSN 0963-8695.
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WRAP_EDwards_0271116-px-101012-benlaserrandtv5.pdf - Accepted Version Download (2025Kb) | Preview |
Official URL: http://dx.doi.org/10.1016/j.ndteint.2011.02.001
Abstract
Non-destructive testing is an important technique, and improvements are constantly needed. Surface defects in metals are not necessarily confined to orientations normal to the sample surface; however, much of the previous work investigating the interaction of ultrasonic surface waves with surface-breaking defects has assumed cracks inclined at 90° to the surface. This paper explores the interaction of Rayleigh waves with cracks which have a wide range of angles and depths relative to the surface, using a non-contact laser generation and detection system. Additional insight is acquired using a 3D model generated using finite element method software. A clear variation of the reflection and transmission coefficients with both crack angle and length is found, in both the out-of-plane and in-plane components. The 3D model is further used to understand the contributions of different wavemodes to B-Scans produced when scanning a sample, to enable understanding of the reflection and transmission behaviour, and help identify angled defects. Knowledge of these effects is essential to correctly gauge the severity of surface cracking.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QC Physics T Technology > TA Engineering (General). Civil engineering (General) |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Library of Congress Subject Headings (LCSH): | Nondestructive testing, Ultrasonic testing, Rayleigh waves, Metals -- Defects, Surfaces (Technology) -- Defects | ||||
Journal or Publication Title: | NDT & E International | ||||
Publisher: | Elsevier Sci Ltd. | ||||
ISSN: | 0963-8695 | ||||
Official Date: | July 2011 | ||||
Dates: |
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Volume: | Vol.44 | ||||
Number: | No.4 | ||||
Page Range: | pp. 353-360 | ||||
DOI: | 10.1016/j.ndteint.2011.02.001 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Date of first compliant deposit: | 18 December 2015 | ||||
Date of first compliant Open Access: | 18 December 2015 | ||||
Funder: | European Research Council (ERC), National Endowment for Science, Technology and the Arts (Great Britain) (NESTA) | ||||
Grant number: | 202735 (ERC) |
Data sourced from Thomson Reuters' Web of Knowledge
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