Analysis of Ultrasonic Wave Scattering for Characterization of Defects in Solids.
ROCKWELL INTERNATIONAL THOUSAND OAKS CALIF SCIENCE CENTER
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The report summarizes the results of a program to characterize the scattering of ultrasonic acoustic waves by defects in solids. The program is intended to analyze and verify by direct measurement scattering by spheroidal cavities and inclusions in a metallic matrix. The work to date has been confined to analysis of spherical scatterers and the measurement of scattering from spherical voids. The measured scattering patterns are in agreement with the predictions of the theory. The observed deviations may be understood as due to the effects of the pulse shape and finite pulse length of the transmitting transducer compared to the monochromatic wave form of the theoretical analysis. It is concluded even from these limited measurements that a spherical cavity has the characteristics necessary for use as standard defect for NDT. Author
- Metallurgy and Metallography
- Test Facilities, Equipment and Methods