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| Presentation | 2018-01-23 15:15 [Invited Talk] Materials Characterization by Electromagnetic Acoustic Resonance -- Physical Principle and Applications of EMATs -- Hirotsugu Ogi (Osaka Univ.)  US2017-101 EA2017-88 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Abstract The electromagnetic acoustic transducer (EMAT) can generate and detect ultrasonic waves in metals and piezomagnetic materials contactlessly. This non-contacting characteristic allows measurements for moving specimens and at elevated temperatures. However, the low transduction efficiency between the electromagnetic energy and mechanical energy has restricted EMAT applications. We then used EMATs for acoustic resonance methods, where the low transduction efficiency is compensated with the high S/N ratio of the resonance method, and the non-contacting measurement with EMAT avoids generation of the complicated resonance mode, involving the transducer and coupling material as well as the specimen. We call this method the EMAR (electromagnetic acoustic resonance). In this paper, I explain the fundamental principle of EMATs (the Lorentz-force and magnetostriction-force mechanisms) and show some applications of EMAR, including the non-destructive evaluations and elastic-constants measurements. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | EMAT / resonance / Lorentz force / magnetostriction force / non-destructive evaluation / elastic constants / / | |
| Reference Info. | IEICE Tech. Rep., vol. 117, no. 398, US2017-101, pp. 99-105, Jan. 2018. | |
| Paper # | US2017-101 | |
| Date of Issue | 2018-01-16 (US, EA) | |
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | US2017-101 EA2017-88 |
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| Conference Information | |
| Committee | US EA |
| Conference Date | 2018-01-23 - 2018-01-24 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | US |
| Conference Code | 2018-01-US-EA |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Materials Characterization by Electromagnetic Acoustic Resonance |
| Sub Title (in English) | Physical Principle and Applications of EMATs |
| Keyword(1) | EMAT |
| Keyword(2) | resonance |
| Keyword(3) | Lorentz force |
| Keyword(4) | magnetostriction force |
| Keyword(5) | non-destructive evaluation |
| Keyword(6) | elastic constants |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Hirotsugu Ogi |
| 1st Author's Affiliation | Osaka University (Osaka Univ.) |
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| Speaker | Author-1 |
| Date Time | 2018-01-23 15:15:00 |
| Presentation Time | 50 minutes |
| Registration for | US |
| Paper # | US2017-101, EA2017-88 |
| Volume (vol) | vol.117 |
| Number (no) | no.398(US), no.399(EA) |
| Page | pp.99-105(US), pp.25-31(EA) |
| #Pages | 7 |
| Date of Issue | 2018-01-16 (US, EA) |
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