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Publications (2 of 2) Show all publications
Tofeldt, O. & Ryden, N. (2018). Guided wave evaluation techniques for testing of plate-like concrete structures. In: : . Paper presented at 12th European Conference on Non-Destructive Testing (ECNDT 2018), June 11-15, Gothenburg, 2018 (pp. 1-4).
Open this publication in new window or tab >>Guided wave evaluation techniques for testing of plate-like concrete structures
2018 (English)Conference paper, Published paper (Other academic)
Abstract [en]

There is a growing need for non-destructive techniques capable of investigating civilengineering structures of concrete material. The Impact-Echo (IE) method is one suchtechnique based on the study of a resonant and stationary mode. This mode corresponds to a Lamb mode. In turn, this accentuates that the IE method can easily be extended to include the analysis of propagating Lamb modes as well. Thereby a quantitative evaluation of the elastic plate properties and thickness is possible. Moreover, the use of Lamb waves lay the foundations for extended analysis which makes measurements based on an extension of the IE method an attractive complement to current ultrasonic techniques for plate-like concrete structures.

Keywords
Civil engineering, Concrete, Surface waves
National Category
Composite Science and Engineering Manufacturing, Surface and Joining Technology
Research subject
Production Technology; ENGINEERING, Manufacturing and materials engineering
Identifiers
urn:nbn:se:hv:diva-12917 (URN)
Conference
12th European Conference on Non-Destructive Testing (ECNDT 2018), June 11-15, Gothenburg, 2018
Available from: 2018-09-18 Created: 2018-09-18 Last updated: 2018-09-18Bibliographically approved
Tofeldt, O., Pierce, S., Smillie, G., Kerr, W., Flockhart, G., Macleod, C., . . . McMahon, D. (2018). Investigation of fundamental ultrasonic propagation characteristics in NDT of Electron Beam Melted additive manufactured samples: Inconel 718. In: : . Paper presented at 12th European Conference on Non-Destructive Testing (ECNDT 2018), June 11-15, Gothenburg, 2018 (pp. 1-4).
Open this publication in new window or tab >>Investigation of fundamental ultrasonic propagation characteristics in NDT of Electron Beam Melted additive manufactured samples: Inconel 718
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2018 (English)Conference paper, Published paper (Other academic)
Abstract [en]

New approaches for efficient NDT inspection of modern additively manufactured metallic components are required urgently to qualify and validate the next generation of metallic parts across a range of industries. Ultrasonic testing is a fundamental component of NDT for such additive manufacturing processes. This work studies the ultrasonic propagation characteristics of EBM manufactured sample coupons in Inconel 718material. Fundamental longitudinal and shear wave velocity measurements are experimentally measured in 3 orthogonal build directions of the sample coupons. Results show a dependency of the ultrasonic velocities and the build direction. The measured velocities are further verified in a phased array measurement showing successful results that highlights the potential of continued studies with synthetic apertures techniques.

Keywords
Propagagation and scattering, Ultrasonics
National Category
Metallurgy and Metallic Materials Composite Science and Engineering
Research subject
ENGINEERING, Manufacturing and materials engineering; Production Technology
Identifiers
urn:nbn:se:hv:diva-12915 (URN)
Conference
12th European Conference on Non-Destructive Testing (ECNDT 2018), June 11-15, Gothenburg, 2018
Projects
Suman-next 400151
Available from: 2018-09-18 Created: 2018-09-18 Last updated: 2018-09-18Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0003-0790-1461

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