8. Technique Development and Probe Design for Hollow Cylinder Inspection

  1. Mark V. Brook

Published Online: 2 JUL 2012

DOI: 10.1002/9781118104781.ch8

Ultrasonic Inspection Technology Development and Search Unit Design: Examples of Practical Applications

Ultrasonic Inspection Technology Development and Search Unit Design: Examples of Practical Applications

How to Cite

Brook, M. V. (2011) Technique Development and Probe Design for Hollow Cylinder Inspection, in Ultrasonic Inspection Technology Development and Search Unit Design: Examples of Practical Applications, John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9781118104781.ch8

Author Information

  1. West Hartford, Connecticut, USA

Publication History

  1. Published Online: 2 JUL 2012
  2. Published Print: 18 NOV 2011

ISBN Information

Print ISBN: 9780470874349

Online ISBN: 9781118104781

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Keywords:

  • hollow cylinder inspection;
  • Lamb waves;
  • probe design;
  • steam generator tubing (SGT)

Summary

An ultrasonic inspection of a test object with a thick wall can be treated as an inspection of a semi-infinite medium. When the wall thickness is much greater than the wavelength (T >>λ) the beam will propagate in a zigzag path, and the mode will not change. In instances where the wall thickness is t = (3− 4) λ, a new phenomenon will be observed—plate or Lamb waves can be generated. When Lamb waves propagate in a thin layer, two separate velocities of wave propagation should be considered: phase velocity and group velocity. This chapter discusses the technique development and probe design for the inspection of different types of hollow cylinders, which have unique characteristics. One of the first applications of Lamb-type guided waves was used in steam generator tubing (SGT) inspection of the type generally used in nuclear power plants and other power generating facilities.

Controlled Vocabulary Terms

design; probes; surface acoustic waves