Journal
INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS
Volume 58, Issue 3, Pages 309-318Publisher
IOS PRESS
DOI: 10.3233/JAE-180016
Keywords
Electromagnetic acoustic transducer; high-temperature environment; signal processing; pulsed magnet
Funding
- Japan Society for the Promotion of Science (JSPS) [24656080]
- JSPS Core-to-Core Program, A. Advanced Research Networks, International research core on smart layered materials and structures for energy saving
- Grants-in-Aid for Scientific Research [24656080] Funding Source: KAKEN
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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 degrees 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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