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Ultrasounds Back-Scattering Measurements for New Anisotropy Indicator Construction

J. MOYSAN, G. CORNELOUP.
Laboratoire de Caractérisation Non Destructive
Université de la Méditerranée - IUT GMP
Avenue Gaston Berger - 13625 Aix en Provence Cédex - France
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ABSTRACT

INTRODUCTION

STEEL GRAIN STRUCURE IN CASE OF MULTIPASS WELDING

ULTRASONIC WAVES ATTENUATION

RAYLEIGH SCATTERING REGION

BACKSCATTERED NOISE

EXTENSION TO OBLIQUE INCIDENCE TESTING

CALCULATION OF THE ATTENUATION COEFFICIENT FROM NOISE SIGNALS

EXPERIMENTS

CONCLUSION

REFERENCES

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  2. [BAI 77] BAIKIE B. L. YADD D., Oriented structures and properties in type 316 stainless steel metal, Int. Conf. Solidification and Casting, Metals Society, Sheffield Univ, 1977, p. 438 - 443.
  3. [BIL 82] de BILLY M., QUENTIN G., Backscattering of acoustic waves by randomly rough surfaces of elastic solids immersed in water , J. Acoust. Soc. Am. 72 (2), August 1982, p.591-601
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  6. [HIR 86] HIRSEKORN S., Directionnal dependence of ultrasonic propagation in textured polycrystals, J. Acoust. Soc. Am. 79 (5), May 1986, p.1269-1279
  7. [NEU 89] NEUMANN A. W. E., On the State of the art of the inspection of austenitic welds with ultrasound, Int. J. Pres. Ves. & Piping 39, 1989, p.227 - 246
  8. [OGI 85] OGILVY J. A, A model for elastic wave propagation in anisotropic media with application to ultrasonic inspection through austenitic steel, British Journal of NDT, n°1, vol 27, 1985, p.13-21
  9. [SAN 88] SANIIE J., WANG T., BILGUTAY N.M., Statistical evaluation backscattered ultrasonic grain signals, J. Acoust. Soc. Am. 84 (1), July 1988, p.400-408

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