Ultrasonic imaging in coarse-grained stainless steels by total focusing method

E.L. Villaverde (1) , S. Robert (1) , C. Prada (2)

1 LIC (CEA, LIST) - Laboratoire Instrumentation et Capteurs (CEA, LIST)
2 ESPCI Paris - Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris

In the present work, the Total Focusing Method (TFM) is used to image flaws in coarse-grained steels with a contact phased-array probe. In order to reduce the noise introduced by the heterogeneous structure, as well as artifacts due to surface guided waves, the Decomposition of the Time Reversal Operator method is performed before calculating TFM images.

Mots clés: instrumentation; non destructive testing; ultrasounds; imaging; transducer array

Domaines: Instrumentations et Détecteurs [physics.ins-det]; Traitement du signal et de l'image [eess.SP]; Acoustique [physics.class-ph]

E.L. Villaverde, S. Robert, C. Prada. Ultrasonic imaging in coarse-grained stainless steels by total focusing method. 42nd annual review of progress in quantitative nondestructive evaluation: Incorporating the 6th European-American Workshop on Reliability of NDE, Jul 2015, Minneapolis, United States. ⟨10.1063/1.4940522⟩. ⟨cea-01811904⟩