Measurement of ultrasonic scattering attenuation in austenitic stainless steel welds - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Ultrasonics Année : 2014

Measurement of ultrasonic scattering attenuation in austenitic stainless steel welds

Marie-Aude Ploix
Philippe Guy
Bertrand Chassignole
  • Fonction : Auteur
  • PersonId : 858506
EDF
Joseph Moysan
Gilles Corneloup

Résumé

Multipass welds made of 316L stainless steel are specific welds of the primary circuit of pressurized water reactors in nuclear power plants. Because of their strong heterogeneous and anisotropic nature due to grain growth during solidification, ultrasonic waves may be greatly deviated, split and attenuated. Thus, ultrasonic assessment of the structural integrity of such welds is quite complicated. Numerical codes exist that simulate ultrasonic propagation through such structures, but they require precise and realistic input data, as attenuation coefficients. This paper presents rigorous measurements of attenuation in austenitic weld as a function of grain orientation. In fact attenuation is here mainly caused by grain scattering. Measurements are based on the decomposition of experimental beams into plane-wave angular spectra and on the modeling of the ultrasonic propagation through the material. For this, the transmission coefficients are calculated for any incident plane wave on an anisotropic plate. Two different hypotheses on the welded material are tested: first it is considered as monoclinic, and then as triclinic. Results are analyzed, and validated through comparison to theoretical predictions of related literature. They underline the great importance of well-describing the anisotropic structure of austenitic welds for UT modeling issues.
Fichier non déposé

Dates et versions

hal-00978866 , version 1 (14-04-2014)

Identifiants

Citer

Marie-Aude Ploix, Philippe Guy, Bertrand Chassignole, Joseph Moysan, Gilles Corneloup, et al.. Measurement of ultrasonic scattering attenuation in austenitic stainless steel welds. Ultrasonics, 2014, 54 (7), pp.1729-1736. ⟨10.1016/j.ultras.2014.04.005⟩. ⟨hal-00978866⟩
278 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More