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 journalArticle

1 Citation (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 languageEnglish
Pages (from-to)309-318
Number of pages10
JournalInternational Journal of Applied Electromagnetics and Mechanics
Volume58
Issue number3
DOIs
Publication statusPublished - 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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