Advances in Ultrasonic Testing of Austenitic Stainless Steel Welds

  • Moysan, J. (Laboratoire de Caracterisation Non Destructive, Universite de la Mediterranee, IUT Aix en Provence) ;
  • Ploix, M.A. (Laboratoire de Caracterisation Non Destructive, Universite de la Mediterranee, IUT Aix en Provence) ;
  • Corneloup, G. (Laboratoire de Caracterisation Non Destructive, Universite de la Mediterranee, IUT Aix en Provence) ;
  • Guy, P. (Laboratoire MATEIS, INSA Lyon) ;
  • Guerjouma, R. El (LAUM, Avenue Olivier Messiaen) ;
  • Chassignole, B. (Department MMC, EDF R&D, Site des Renardieres)
  • 발행 : 2008.06.30

초록

A precise description of the material is a key point to obtain reliable results when using wave propagation codes. In the case of multipass welds, the material is very difficult to describe due to its anisotropic and heterogeneous properties. Two main advances are presented in the following. The first advance is a model which describes the anisotropy resulting from the metal solidification and thus the model reproduces an anisotropy that is correlated with the grain orientation. The model is called MINA for modelling anisotropy from Notebook of Arc welding. With this kind of material model1ing a good description of the behaviour of the wave propagation is obtained, such as beam deviation or even beam division. But another advance is also necessary to have a good amplitude prediction: a good quantification of the attenuation, particularly due to grain scattering, is also required as far as attenuation exhibits a strong anisotropic behaviour too. Measurement of attenuation is difficult to achieve in anisotropic materials. An experimental approach has been based both on the decomposition of experimental beams into plane waves angular spectra and on the propagation modelling through the anisotropic material via transmission coefficients computed in generally triclinic case. Various examples of results are showed and also some prospects to continue refining numerical simulation of wave propagation.

키워드

참고문헌

  1. Ahmed, S. and Thompson, R. B. (1992) Effect of Preferred Grain Orientation and Grain Elongation on Ultrasonic Wave Propagation in Stainless Steel, in: D. O. Thompson and D. E. Chimenti (Eds.), Review of Progress in QNDE 11, pp. 1999-2006
  2. Ahmed, S. and Thompson, R. B. (1996) Propagation of Elastic Waves in Equiaxed Stainless‐steel Polycrystals with Aligned [001] Axes, J. Acoust. Soc. Am. 99, pp. 2086-2096 https://doi.org/10.1121/1.415395
  3. Apfel, A., Moysan, J., Corneloup, G., Fouquet, T. and Chassignole, B. (2005) Coupling an Ultrasonic Propagation Code with a Model of the Heterogeneity of Multipass Welds to Simulate the Ultrasonic Testing, Ultrasonics, Vol. 43, Issue 6, pp. 447-456 https://doi.org/10.1016/j.ultras.2004.09.004
  4. Becache, E., Joly, P. and Tsogka, C. (2000) An Analysis of New Mixed Finite Elements for the Approximation of Wave Propagation Problems, SIAM Journal on Numerical Analysis, Vol. 37, pp. 1053-1084 https://doi.org/10.1137/S0036142998345499
  5. Chassignole, B., Paris, O. and Abittan, E. (2007) Ultrasonic Examination of a CVCS Weld, 6th International Conference on NDE in Relation to Structural Integrity for Nuclear and Pressurised Components, Budapest, 8 - 10 October
  6. Chassignole, B., Villard, D., Dubuget, M., Baboux, J. C. and El Guerjouma, R. (2000) Characterization of Austenitic Stainless Steel Welds for Ultrasonic NDT, in: D. O. Thompson and D. E. Chimenti (Eds.), Review of Progress in QNDE, Vol. 20, pp. 1325-1332
  7. Corneloup, G., Apfel, A., Aldon, L., Deschaux, F., Migliorini, D., Cervellin, D., Fras, G., Barreau, G., Chassignole, B. and Villard, D. (2001) CNRIUT Proceedings, Roanne, pp. 325-334
  8. Hirsekorn, S. (1986) Directional Dependence of Ultrasonic Propagation in Textured Polycrystals, Journal of the Acoustical Society of America, Vol. 79, No. 5, pp. 1269-1279 https://doi.org/10.1121/1.393706
  9. Hosten, B. (1991) Reflection and Transmission of Acoustic Plane Waves on an Immersed Orthotropic and Viscoelastic Solid Layer, Journal of the Acoustical Society of America, Vol. 89, No. 6, pp. 2745-2752 https://doi.org/10.1121/1.400685
  10. Kurz, W. (1995) Dendrite Growth in Welding, Mathematical Modelling of Weld Phenomena 2, pp. 41‐53
  11. Limmaneevichitr, C. and Kou, S. (2000) Experiments to Simulate Effect of Marangoni Convection on Weld Pool Shape, Welding Research Supplement, August, pp. 231-237
  12. Moysan, J., Apfel, A., Corneloup, G., Chasssignole, B. (2003) Modelling the Grain Orientation of Austenitic Stainless Steel Multipass Welds to Improve Ultrasonic Assessment of Structural Integrity, International Journal of Pressure Vessels and Piping, Vol. 80 No. 2, pp. 77-85 https://doi.org/10.1016/S0308-0161(03)00024-3
  13. Ploix, M. A., Guy, P., El Guerjouma, R., Moysan, J., Corneloup, J. and Chassignole, B. (2006) Attenuation Assessment for NDT of Austenitic Stainless Steel Welds, 9 th European Conference on NDT, Berlin, 25-29 September
  14. Rappaz, M., Gandin, Ch.-A., Jacot, A. and Charbon, Ch., (1995) Modeling of Microstructure Formation, Modeling of Casting, Welding and Advanced Solidification Processes, Vol. VII, pp. 501-516
  15. Seldis, T., Pecorari, C. and Bieth, M (1998) Measurements of Longitudinal Wave Attenuation in Austenitic Steel, 1st International Conference on NDE in Relation to Structural Integrity for Nuclear and Pressurised Components, Amsterdam (Netherlands), pp. 769-777