DETECTION OF KISSING BOND IN EXTRUDED ALUMINUM BY LASER-ULTRASOUND

Kissing bond defects can occur in solid state joined metals, like friction stir welded aluminum or hollow aluminum extrusions produced by means of porthole dies, and its nondestructive detection is crucial for many structural applications. In this paper, high frequency ultrasound generated and detec...

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Published inReview of Progress in Quantitative Nondestructive Evaluation Volume 27A (AIP Conference Proceedings Volume 975) Vol. 975; pp. 279 - 285
Main Authors Kruger, S E, Lord, M, Levesque, D, den Bakker, A J
Format Journal Article
LanguageEnglish
Published 01.01.2008
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Summary:Kissing bond defects can occur in solid state joined metals, like friction stir welded aluminum or hollow aluminum extrusions produced by means of porthole dies, and its nondestructive detection is crucial for many structural applications. In this paper, high frequency ultrasound generated and detected by lasers is applied to detect kissing bonds in extruded aluminum parts. It is found that an echo from the kissing bond discontinuity could be detected when the system has a signal-to-noise ratio (based on the backwall echo) of at least 40 dB in the frequency range of a few hundred MHz.
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ISBN:9780735404946
0735404941
ISSN:0094-243X
DOI:10.1063/1.2902670