Modeling ultrasonic noise and attenuation in elongated duplex polycrystalline materials

Vincent Dorval (1) , Lili Ganjehi (2) , Sylvain Chatillon (1) , Frédéric Jenson (2)

1 LSMA (CEA, LIST) - Laboratoire Simulation et Modélisation Acoustique (CEA, LIST)
2 LMC (CEA, LIST) - Laboratoire Méthodes CND (CEA, LIST)

The interaction between ultrasonic waves and the polycrystalline microstructure of metals leads to structural noise and attenuation, which can cause significant losses in detection performances. Taking these phenomena into account in UT simulation can help designing suitable inspection procedures. It is possible to model them based on the intrinsic scattering coefficients of a material. Expressions of this coefficient valid for duplex elongated materials and for any mode and scattering direction are given in this communication. Structural noise from a titanium alloy was computed based on these expressions and is compared to measurement.

Mots clés: Attenuation; Ultrasound; Grain Noise; Polycrystalline Material

Domaines: Acoustique [physics.class-ph]; Modélisation et simulation

Vincent Dorval, Lili Ganjehi, Sylvain Chatillon, Frédéric Jenson. Modeling ultrasonic noise and attenuation in elongated duplex polycrystalline materials. AIP Conference Proceedings, 1511, pp.1150-1157, 2013, AIP Conference Proceedings - Review of progress in quantitative nondestructive evaluation, vols 32a and 32b., ⟨10.1063/1.4789173⟩. ⟨cea-01828193⟩