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Publication Citation: A Simplified Ultrasonic Immersion Technique for Materials Evaluation

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Author(s): D Xiang; Nelson N. Hsu; Gerald V. Blessing;
Title: A Simplified Ultrasonic Immersion Technique for Materials Evaluation
Published: January 01, 1998
Abstract: A simplified ultrasonic immersion technique has been developed to measure leaky surface and bulk waves in solid materials by using specially designed lensless, line focus polyvinylidene fluoride (PVDF) transducers with a large aperture and a short focal distance. Based on a simple methodology, this technique offers precise velocity measurements for these wave types, from which material properties, such as the elastic moduli, can be determined. Directional leaky wave measurements with this technique have been used to detect material anisotropy, as well as to determine the depth and orientation of a surface crack. The effects of plasma-spray conditions on the acoustic properties of sprayed ceramic coatings possessing rough surfaces and porous microstructures have also been measured using this technique.
Citation: Materials Evaluation
Volume: Vol. 56 (7)
Issue: No. 7
Pages: pp. 854 - 859
Keywords: material characterization;ultrasonic detection;Ultrasonics
Research Areas: Mechanical Metrology