Experimental Study of Scattering of Longitudinal Elastic Waves from Cavities in a Solid Medium

Franzblau, Michael C.; Kraft, David W.

doi:10.1063/1.1659933

Cited by 6 publications

(2 citation statements)

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“…Measurements of y for machined voids with diameters of about 400 pm in titanium are in agreement with these predictions (Tittman et a1 1980). Franzblau and Kraft (1971) have measured the attenuation of longitudinal waves in tungsten filaments. The porosity in these specimens develops after exposure to temperatures above 3000 "C, the dominant scattering species being a distribution of nearly spherical pores.…”

Section: Introductionmentioning

confidence: 99%

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Ultrasonic velocity dispersion in porous materials

Sayers¹

1981

J. Phys. D: Appl. Phys.

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An analytic expression for the ultrasonic dispersion in porous materials is obtained. It is shown that size determination of pores of a few microns radius using ultrasonic dispersion should be possible with available techniques. For pores with radius 0.1-1 mu m higher frequencies, such as those characteristic of vapour-deposited transducers, will be necessary. The velocity dispersion and ultrasonic attenuation depend on averages of different powers of the pore radius. A measurement of both will give information on the mean square deviation in pore sizes as well as the average pore size.

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Section: Introductionmentioning

confidence: 99%

“…Consider two of the examples given in the introduction and $2.1. The polycrystalline tungsten filaments studied by Franzblau and Kraft (1971) had a number density no= 1.3 x IO7 cm-3 with mean radius 8.2 pm. Therefore AY/Y=0.03.…”

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confidence: 99%