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Development of Geometrical Models of Hard-Alpha Inclusions for Ultrasonic Analysis in Titanium Alloys

  • Brian Boyd
  • Chien-Ping Chiou
  • Bruce Thompson
  • Jim Oliver

Abstract

The engine titanium consortium is currently conducting an extensive study of the ultrasonic response and detectability of a number of naturally occurring hard-alpha defects found in titanium billets. These naturally occurring defects appear to be highly irregular in shape and inhomogeneous in composition, and we would like to access the extent to which their responses can be predicted by available ultrasonic scattering models [1]. Three dimensional geometrical (surface and solid) models of the hard-alpha defects are needed in order to obtain the geometrical and material properties to drive the ultrasonic model calculations and the subsequent probability-of-detection evaluation [2].

Keywords

Binary Image Flaw Region Bezier Curve Cylindrical Inclusion Test Defect 
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

  1. 1.
    C.-P. Chiou, F.J. Margetan, R. Bruce Thompson, and Brian Boyd, “Development of Ultrasonic Models for Hard-Alpha Inclusions in Titanium Alloys,” Review of Progress in Quantitative Non-Destructive Evaluation, D.O. Thompson and D.E. Chimenti, Eds. Vol. 16A, 1997.Google Scholar
  2. 2.
    W. Q. Meeker, S.-L. Jeng, C.-P. Chiou and R. B. Thompson, “Improved Methodology for Predicting POD of Detecting Synthetic Hard Alpha Inclusions in Titanium,” Review of Progress in Quantitative Nondestructive Evaluation, Vol. 17 (to be published).Google Scholar
  3. 3.
    Rafael C. Gonzalez and Richard E. Woods, Digital Image Processing, Addison-Wesley Publishing Company, 1992, pp. 458–463.Google Scholar
  4. 4.
    Les Piegl and Wayne Tiller, The NURBS Book, Springer-Verlag Publishing Company, 1995.Google Scholar

Copyright information

© Plenum Press, New York 1998

Authors and Affiliations

  • Brian Boyd
    • 1
  • Chien-Ping Chiou
    • 1
  • Bruce Thompson
    • 1
  • Jim Oliver
    • 2
  1. 1.Center for Non-Destructive EvaluationAmesUSA
  2. 2.Department of Mechanical EngineeringIowa State UniversityAmesUSA

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