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Principle and Method of Measuring the Relative Ultrasonic Nonlinearity Parameter
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상대 비선형 파라미터 측정 원리 및 방법

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Type
Proceeding
Author
Kyung-Young Jhang (한양대학교) Dong-Gi Song (한양대학교) Jiung Yoo (한양대학교)
Journal
The Korean Society For Nondestructive Testing The Korean Society for Nondestructive Testing Annual Spring Conference 2021 The Korean Society for Nondestructive Testing Annual Spring Conference 2021
Published
2021.6
Pages
55 - 55 (1page)

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Principle and Method of Measuring the Relative Ultrasonic Nonlinearity Parameter
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The nonlinear ultrasonic technique can evaluate degradation of a material because it is sensitive to microstructural changes such as precipitate and dislocation. Especially, the relative acoustic nonlinearity parameter is simple measurement and easy to employ in industrial field because it is defined by mV level received electric signal in contrast with the absolute acoustic nonlinearity parameter defined by pm level displacement amplitude. However, since the relative acoustic nonlinearity parameter measurement is sensitive to specification of equipment and measurement environment, it is needed to establish standard of quantitative me^_@span style=color:#999999 ^_# ... ^_@/span^_#^_@a href=javascript:; onclick=onClickReadNode('NODE10568175');fn_statistics('Z354','null','null'); style='color:#999999;font-size:14px;text-decoration:underline;' ^_#View All^_@/a^_#

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