NASA NTRS · 19730000051
Prototype ultrasonic instrument for quantitative testing
Abstract
Ultrasonic instrument has been developed for use in quantitative nondestructive evaluation of material defects such as cracks, voids, inclusions, and unbonds. Instrument is provided with standard pulse source and transducer for each frequency range selected and includes integral aids that allow calibration to prescribed standards.
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Lynworth, L. C., Dubois, J. L., Kranz, P. R.. 1973-02-01. Prototype ultrasonic instrument for quantitative testing. https://ntrs.nasa.gov/citations/19730000051
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