A Simplified Ultrasonic Immersion Technique for Materials Evaluation

Published

January 1, 1998

Author(s)

D Xiang, Nelson N. Hsu, Gerald V. Blessing

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

Pub Type

Journals

Keywords

material characterization, ultrasonic detection, Ultrasonics

Citation

Xiang, D. , Hsu, N. and Blessing, G. (1998), A Simplified Ultrasonic Immersion Technique for Materials Evaluation, Materials Evaluation (Accessed May 21, 2025)