Performance Characteristics of Electromagnetic Generation and Detection of Shear Horizontal Waves by Electromagnetic Acoustic Transducers

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作者：
机构：
[1] Kurozumi, Yasuo
[2] Higashi, Masayoshi
[3] Satou, Toshinori
[4] Nishikawa, Masahiro
来源：
Kurozumi, Y. (kurozumi@inss.cojp) | 2001年 / American Society for Nondestructive Testing卷 / 59期
关键词：
Shear flow - Acoustic emission testing - Acoustic transducers - Fracture testing - Eddy current testing - Ultrasonic testing - Steel testing;
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摘要：
The diagnosis of material degradation and the detection of discontinuities in austenitic cast stainless steel have been studied by using ultrasonic waves generated by an electromagnetic acoustic transducer (EMAT). A simple circuit model for an EMAT generating horizontally polarized shear waves (SH waves) was established and magnitudes of oscillations were estimated by using the model and experimental data. As a result, the attenuation was described at two different frequencies of SH waves.
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