Laser/Emat Systems for the Ultrasonic Inspection of Aluminum

  • D. A. Hutchins
  • F. Hauser

Abstract

The metals manufacturing industry makes routine use of ultrasonic nondestructive testing techniques for the detection of defects such as cracking. It is becoming increasingly clear, however, that more advanced non-contact techniques are required for the testing of materials which are either in motion or at an elevated temperature. An example is in the continuous casting of aluminum, where differential cooling across the material can lead to stresses which, in turn, can result in porosity or cracks. In this case, an on-line defect detection system is desirable, to detect the onset of manufacturing problems. Hence, the aim is not to detect all defects, but to give an indication of problems in the solidification process.

Keywords

Porosity Acetone Acoustics Ruby Line Source 

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References

  1. 1.
    D.A. Hutchins, Ultrasonic generation by pulsed laser, to be published in Physical Acoustics, Vol. XVIII (Academic Press, W.P. Mason and R.N. Thursten, Eds., 1986).Google Scholar
  2. 2.
    C.B. Scruby, R.J. Dewhurst, D.A. Hutchins and S.B. Palmer, Laser-generated ultrasound in metals, in Research Techniques in Nondestructive Testing, Vol. V (Academic Press, R. Sharpe Ed., 1982).Google Scholar
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    H.M. Frost, Electromagnetic-ultrasound transducers: Principles, practice and applications, in Physical Acoustics, Vol. XIV (Academic Press, W.P. Mason and R.N. Thurston, Eds., 1979).Google Scholar
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    D.A. Hutchins, T. Goetz and F. Hauser, “Surface wave using laser generation and EMAT detection”, to be published in IEEE Trans. Ultras. Ferr. Freq. Control, (September 1986).Google Scholar

Copyright information

© Plenum Press, New York 1987

Authors and Affiliations

  • D. A. Hutchins
    • 1
  • F. Hauser
    • 1
  1. 1.Physics DepartmentQueen’s UniversityKingstonCanada

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