Development and performance evaluation of a high-temperature electromagnetic acoustic transducer for monitoring metal processing

Shohei Ogata; Tetsuya Uchimoto; Toshiyuki Takagi; Gerd Dobmann

doi:10.3233/JAE-180016

Development and performance evaluation of a high-temperature electromagnetic acoustic transducer for monitoring metal processing

Shohei Ogata, Tetsuya Uchimoto, Toshiyuki Takagi, Gerd Dobmann

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

An electromagnetic acoustic transducer (EMAT) design using an air-cored solenoid coil as a pulsed electromagnet is proposed for the high-temperature non-contact monitoring of metal processing, and the operation of a prototype device is confirmed at temperatures ranging from room temperature to 700 °C. The coil generates a biasing magnetic field that allows the device to overcome the Curie temperature limitations of conventional EMATs. Pulse-echo measurements on carbon steel are made at high temperatures, and the superposition of the nth compression method is used as a signal processing technique to confirm that the shear wave velocity decreases with increasing temperature, and it is verified that the EMAT can operate at high temperature.

Original language	English
Pages (from-to)	309-318
Number of pages	10
Journal	International Journal of Applied Electromagnetics and Mechanics
Volume	58
Issue number	3
DOIs	https://doi.org/10.3233/JAE-180016
Publication status	Published - 2018

Keywords

Electromagnetic acoustic transducer
High-temperature environment
Pulsed magnet
Signal processing

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Electrical and Electronic Engineering

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10.3233/JAE-180016

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Development and performance evaluation of a high-temperature electromagnetic acoustic transducer for monitoring metal processing. / Ogata, Shohei; Uchimoto, Tetsuya ; Takagi, Toshiyuki; Dobmann, Gerd.

In: International Journal of Applied Electromagnetics and Mechanics, Vol. 58, No. 3, 2018, p. 309-318.

Research output: Contribution to journal › Article › peer-review

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abstract = "An electromagnetic acoustic transducer (EMAT) design using an air-cored solenoid coil as a pulsed electromagnet is proposed for the high-temperature non-contact monitoring of metal processing, and the operation of a prototype device is confirmed at temperatures ranging from room temperature to 700 °C. The coil generates a biasing magnetic field that allows the device to overcome the Curie temperature limitations of conventional EMATs. Pulse-echo measurements on carbon steel are made at high temperatures, and the superposition of the nth compression method is used as a signal processing technique to confirm that the shear wave velocity decreases with increasing temperature, and it is verified that the EMAT can operate at high temperature.",

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author = "Shohei Ogata and Tetsuya Uchimoto and Toshiyuki Takagi and Gerd Dobmann",

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N1 - Funding Information: This study was supported by a Grant-in-Aid for Challenging Exploratory Research (grant no. 24656080) from the Japan Society for the Promotion of Science (JSPS), and by the JSPS Core-to-Core Program, A. Advanced Research Networks, “International research core on smart layered materials and structures for energy saving”. Publisher Copyright: © 2018 - IOS Press and the authors. All rights reserved. Copyright: Copyright 2018 Elsevier B.V., All rights reserved.

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AB - An electromagnetic acoustic transducer (EMAT) design using an air-cored solenoid coil as a pulsed electromagnet is proposed for the high-temperature non-contact monitoring of metal processing, and the operation of a prototype device is confirmed at temperatures ranging from room temperature to 700 °C. The coil generates a biasing magnetic field that allows the device to overcome the Curie temperature limitations of conventional EMATs. Pulse-echo measurements on carbon steel are made at high temperatures, and the superposition of the nth compression method is used as a signal processing technique to confirm that the shear wave velocity decreases with increasing temperature, and it is verified that the EMAT can operate at high temperature.

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Development and performance evaluation of a high-temperature electromagnetic acoustic transducer for monitoring metal processing

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Keywords

ASJC Scopus subject areas

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