A Nonlinear Ultrasonic Imaging System for Detecting Minute Damage and Defects of nm Gaps in Industrial Materials

A nonlinear ultrasonic imaging system is developed for detecting and imaging of minute damage and defects of nm gaps in industrial materials, which are undetectable by conventional ultrasonic testing. A high powered pulser to excite large amplitude incident waves and high pass or band pass filters t...

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Bibliographic Details
Published inHi-hakai kensa Vol. 54; no. 9; pp. 509 - 514
Main Authors KAWASHIMA, Koichiro, MURASE, Morimasa, OHARA, Yoshikazu, YAMADA, Ryuzo, MATSUSHIMA, Masamichi, UEMATSU, Mitsuyoshi, FUJITA, Fumio, MIYA, Takekazu
Format Journal Article
LanguageJapanese
English
Published Tokyo The Japanese Society for Non-Destructive Inspection 01.09.2005
Japan Science and Technology Agency
Subjects
Defects
Harmonic generation
Kissing bonds
Micro cracks
Nonlinear Ultrasonics
Ultrasonic imaging
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Summary:A nonlinear ultrasonic imaging system is developed for detecting and imaging of minute damage and defects of nm gaps in industrial materials, which are undetectable by conventional ultrasonic testing. A high powered pulser to excite large amplitude incident waves and high pass or band pass filters to extract the 2nd harmonic are combined with the conventional ultrasonic imaging system. The system is applied to visualize fiber/matrix debonding or matrix crackings in CFRP or FRM laminated plates. It also visualizes anomalous substructures in amorphous diffusion bonded interfaces. This system is also useful for detecting semi-closed cracks with an opening of nm order.
Bibliography:ObjectType-Article-2
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ISSN:0367-5866
DOI:10.11396/jjsndi.54.509