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Ultrasonic Inspection of Titanium Alloys with a Time Reversal Mirror

  • Najet Chakroun
  • Véronique Miette
  • Mathias Fink
  • François Wu
  • Gérard Mangenet
  • Lionel Beffy
Chapter

Abstract

Ultrasonic Time Reversal Mirror (TRM) is an original solution to detect small cracks in a solid of any geometrical shape. Indeed, nondestructive testing need high resolution capabilities, high reliability and shortest control time. But the more recent techniques need an a priori knowledge of the liquid-solid interface and present limitations. The first of these uses several large prefocussed arrays, one array for each testing depth. Therefore this control system is sensitive to the arrays alignment, limited by the array precision focusing, and requires a complex mechanical follower system. A greater flexibility can be obtained by a second technique that is based on delay lines. But an accurate knowledge of the interface and a high calculs resolution are indispensable.

Keywords

Fermat Surface Speckle Noise Defect Zone Ultrasonic Inspection Deviation Histogram 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

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Copyright information

© Plenum Press, New York 1995

Authors and Affiliations

  • Najet Chakroun
    • 1
  • Véronique Miette
    • 1
  • Mathias Fink
    • 1
  • François Wu
    • 1
  • Gérard Mangenet
    • 2
  • Lionel Beffy
    • 2
  1. 1.Laboratoire Ondes et Acoustique EspciUniversity Paris VIIParisFrance
  2. 2.SNECMA, Service CTPMEvryFrance

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