NDT.net - November 1998, Vol. 3 No. 11

Table of Contents ECNDT '98

Session: Materials Characterization

Ultrasonic Backscattering Formulation Applied to Cast Iron Characterization

Silvio Elton Kruger, Joao Marcos Alcoforado Rebello
LABOEND/PEMM/COPPE - Universidade Federal do Rio de Janeiro
Caixa Postal 68505 CEP 21945-970, Rio de Janeiro - RJ Brazil
skruger@metalmat.ufrj.br and jmarcos@metalmat.ufrj.br

Jacques Charlier
Service de Metallurgie Physique - Universite Libre de Bruxelles
Av. F. Rooselvet, 50 CP 194/03, B - 1050 Bruxelles Belgique
Corresponding Author Contact:
Silvio Kruger
Av. A. Buyl, 55 B-1050 Brussels, Belgium, Phone: 32 2 650 2700, Fax: 32 2 650 2786
Email: skruger@ulb.ac.be , URL: http://student.ulb.ac.be/~skruger/welcome.html




Backscattering Formulation

Preliminary Comparison with Experimental Results




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  2. Roberjot, V. and Bridal, S. L. "Absolute Backscatter Coefficient over a Wide Range of Frequencies in a Tissue-Mimicking Phantom Containing Two Populations of Scatterers" IEEE Trans. on Ultras., Ferroel., and Freq. Control, vol. 43 n 5, 1996, pp 970.
  3. Chen, X.; Phillips, D.; Schwarz, K. Q.; Mottley, J. G.; Parker, K. J. 'The Measurement of Backscatter Coefficient from a Broadband Pulse-Echo System: A New Formulation' IEEE Trans. on Ultras., Ferroel., and Freq. Control, vol. 44 n 2, 1997, pp 515.
  4. Chen, J-F, Zagzebski, J. A. "Frequency Dependence of Backscatter Coefficient Versus Scatterer Volume Fraction" IEEE Trans. on Ultras., Ferroel., and Freq. Control, vol. 43 n 3, 1996, pp 345.
  5. O'Donnel, M. and Miller, J. G. " Quantitative Broadband Ultrasonic Backscater: An Approach to Nondestructive Evaluation in Acoustically Inhomogeneous Materials" J. Appl. Phys. vol. 52, n. 2, 1981, pp 1056.
  6. Russel, M. D. et al "Experimental Estimation of the Longitudinal-wave Backscatter Coefficients for Ultrasonic Interrogation of Weak Scattering Materials" J. Acoust. Soc Am. vol. 93, n. 3, 1993, 1267.
  7. Yalda, I. et al 'Ultrasonic Grain Noise in Polycrystals: A Monte Carlo Model ' J. Acoust. Soc. Am. vol. 99, n.6, 1996,3445.
  8. Ying, C. F. and Truell, R. "Scattering of a Plane Longitudinal Wave by a Spherical Obstacle in an Isotropically Elastic Solid" J. of Appl. Phys, vol. 27 n. 9, 1956, pp 1086.
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