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High power phased EMAT arrays for nondestructive testing of as-cast steel
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Tkocz, Jozef, Greenshields, David and Dixon, Steve M. (2018) High power phased EMAT arrays for nondestructive testing of as-cast steel. NDT & E International . doi:10.1016/j.ndteint.2018.11.001 (In Press)
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WRAP-high-power-phased-EMAT-arrays-for-nondestructive-testing-As-cast-steel-Dixon-2018.pdf - Accepted Version Embargoed item. Restricted access to Repository staff only until 8 November 2019. Contact author directly, specifying your specific needs. - Requires a PDF viewer. Available under License Creative Commons Attribution Non-commercial No Derivatives 4.0. Download (1998Kb) |
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WRAP-high-power-phased-EMAT-arrays-nondestructive-testing-as-cast-steel-Tkocz-2018.pdf - Accepted Version Embargoed item. Restricted access to Repository staff only - Requires a PDF viewer. Download (543Kb) |
Official URL: https://doi.org/10.1016/j.ndteint.2018.11.001
Abstract
A new high-power electromagnetic acoustic transducer (EMAT) solid state pulser system has been developed that is capable of driving up to 4 EMAT coils with programmable phase delays, allowing for focusing and steering of the acoustic field. Each channel is capable of supplying an excitation current of up to 1.75 kA for a pulse with a rise time of 1 μs. Finite element and experimental data are presented which demonstrate a signal enhancement by a factor of 3.5 (compared to a single EMAT coil) when using the system to transmit a longitudinal ultrasound pulse through a 22.5 cm thick as-cast steel slab sample. Further signal enhancement is demonstrated through the use of an array of detection EMATs, and a demonstration of artificial internal defect detection is presented on a thick steel sample. The design of this system is such that it has the potential to be employed at elevated temperatures for diagnostic measurements of steel during the continuous casting process.
| Item Type: | Journal Article | |||||||||
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| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering T Technology > TS Manufactures |
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| Divisions: | Faculty of Science > Physics | |||||||||
| Library of Congress Subject Headings (LCSH): | Steel, Cast -- Nondestructive testing, Electroacoustic transducers -- Industrial applications | |||||||||
| Journal or Publication Title: | NDT & E International | |||||||||
| Publisher: | Elsevier Sci Ltd. | |||||||||
| ISSN: | 0963-8695 | |||||||||
| Official Date: | 8 November 2018 | |||||||||
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| Date of first compliant deposit: | 7 November 2018 | |||||||||
| DOI: | 10.1016/j.ndteint.2018.11.001 | |||||||||
| Status: | Peer Reviewed | |||||||||
| Publication Status: | In Press | |||||||||
| Publisher Statement: | © 2018, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/. | |||||||||
| Access rights to Published version: | Restricted or Subscription Access | |||||||||
| Copyright Holders: | Elsevier | |||||||||
| RIOXX Funder/Project Grant: |
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