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
charlier@ulb.ac.be
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

TABLE OF CONTENTS


Abstract

Introduction

Backscattering Formulation

Preliminary Comparison with Experimental Results

Discussion/Conclusions

Acknowledgements

References

  1. Ueda, M. and Ozawa, Y. "Spectral Analysis of Echoes for Backscattering Coefficient Measurements" J. Acoust. Soc. Am. vol. 77, n.1, 1985, pp 38.
  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.
  9. Papadakis, E. P. 'Revised Grain-Scattering Formulas and Tables' Journal of the Acoustical Society of America, vol 37 n. 4, 1965, 703.
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