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Ultrasonic Measurement of the Dynamic Elastic Moduli of Small Metal Samples

Published

Author(s)

John A. Slotwinski, Gerald V. Blessing

Abstract

Ultrasonic velocity measurements were used to determine the dynamic elastic moduli small metal samples to a 2[sigma] measurement uncertainty of less than one percent. The samples were cylindrical in shape, possessing nominal diameters of 12 mm, and thicknesses of 6 mm. Aluminum, titanium, and stainless steel compositions were examined. In the longitudinal wave measurements a 20 MHz quartz piezoelectric element transducer was employed in pulse-echo mode, using a tone-burst excitation. These longitudinal time-of-flight measurements were made with a repeatable 2[sigma] measurement uncertainty of [GE] 1.0 ns. Shear time-of-flight measurements, using a 10 MHz contact ceramic piezoelectric element transducer subjected to tone-burst excitation, were made with a repeatable 2[sigma] measurement uncertainty of = 2.0 ns. NIST calibration facilities provided measurements for the density and lengths of these samples, as needed for the moduli calculations. Results indicate that the measurement uncertainties for elastic moduli measurements of this type can be kept quite small.
Citation
Journal of Testing and Evaluation
Volume
27(2)
Issue
No. 2

Keywords

ultrasonic measurements

Citation

Slotwinski, J. and Blessing, G. (1999), Ultrasonic Measurement of the Dynamic Elastic Moduli of Small Metal Samples, Journal of Testing and Evaluation (Accessed July 14, 2024)

Issues

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Created January 1, 1999, Updated February 19, 2017