·Table of Contents
·Materials Characterization and testing

The Ultrasonic Evaluation of Shrinkage Defects in Stailess steel casting Ingot

Nang-Chian Shie and Shyr-Liang Chu
Materials Research Laboratories
Industrial Technology Research Institute
Taiwan, R.O.C.




Specimen and Testing Equipment



  1. The use of ultrasonic straight beam pulse echo techniques can determine the existence of shrinkage in SS304 steel.
  2. The geometric shape of the shrinkage cavity has an important effect on ultrasound signals. Under severe conditions would render the result inconclusive.
  3. The use of computer to process the result into a B-scan is beneficial to the determination of the existence of the shrinkage in steel casting ingot.



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  3. D. S. Kupperman, K. J. Reimann , and J, Abrego-Lopez, "Ultrasonic NDE of Cast Stainless Steel." NDT International. Vol. 20, No. 3, June 1987, pp.145-152.
  4. C. Boveyron, D. Villard, and R. Boudot, "Ultrasonic Testing of Cast Stainless Steel Components." Proc. Of the 11th International Conference on NDE in the Nuclear and Pressure Vessel Industries, Albuquerque, New Mexico, USA, April 30 - May 2, 1992, pp.403-408.
  5. M. Serre, A. Viard, N. de Mathan, and D. Villard, "Ultrasonic NDE Techniques Enhancement for the Cast Stainless Steel Components." 6th European Conference on NDT, Nice, France, Oct. 24-28, 1994, pp. 831-835.

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