Crack detection using resonant ultrasound spectroscopy

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Description

This invention is comprised of a method and apparatus 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 ... continued below

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15 p.

Creation Information

Migliori, A. & Bell, T.M. December 31, 1992.

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This patent is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 42 times . More information about this patent can be viewed below.

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Description

This invention is comprised of a method and apparatus 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.

Physical Description

15 p.

Notes

OSTI as DE94007348

Source

  • Other Information: PBD: 1992

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  • Other: DE94007348
  • Report No.: PATENTS-US--A7834747
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 140519
  • Archival Resource Key: ark:/67531/metadc625128

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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Creation Date

  • December 31, 1992

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

Description Last Updated

  • Feb. 25, 2016, 2:20 p.m.

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Migliori, A. & Bell, T.M. Crack detection using resonant ultrasound spectroscopy, patent, December 31, 1992; New Mexico. (digital.library.unt.edu/ark:/67531/metadc625128/: accessed October 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.