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Title: Crack detection using resonant ultrasound spectroscopy

Method and apparatus are provided for detecting crack-like flaws in components. A plurality of exciting frequencies are generated and applied to a component in a dry condition to obtain a first ultrasonic spectrum of the component. The component is then wet with a selected liquid to penetrate any crack-like flaws in the component. The plurality of exciting frequencies are again applied to the component and a second ultrasonic spectrum of the component is obtained. The wet and dry ultrasonic spectra are then analyzed to determine the second harmonic components in each of the ultrasonic resonance spectra and the second harmonic components are compared to ascertain the presence of crack-like flaws in the component.
 [1];  [1];  [2]
  1. (Santa Fe, NM)
  2. (Albuquerque, NM)
Issue Date:
OSTI Identifier:
Regents of University of California, Office of Technology (Alameda, CA) LANL
Patent Number(s):
US 5351543
Contract Number:
Research Org:
Los Alamos National Laboratory (LANL), Los Alamos, NM
Country of Publication:
United States
crack; detection; resonant; ultrasound; spectroscopy; method; apparatus; provided; detecting; crack-like; flaws; components; plurality; exciting; frequencies; generated; applied; component; dry; condition; obtain; ultrasonic; spectrum; wet; selected; liquid; penetrate; obtained; spectra; analyzed; determine; harmonic; resonance; compared; ascertain; presence; resonant ultrasound; spectroscopy method; resonance spectra; ultrasonic resonance; ultrasound spectroscopy; dry condition; crack detection; /73/