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. 5 figs.
- DOE Contract Number:
- W-7405-ENG-36
- Assignee:
- Univ. of California, Office of Technology Transfer, Alameda, CA (United States)
- Patent Number(s):
- US 5351543; A
- Application Number:
- PPN: US 7-813651
- OSTI ID:
- 7174895
- Resource Relation:
- Patent File Date: 27 Dec 1991
- Country of Publication:
- United States
- Language:
- English
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