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Title: Study of ultrasonic characterization and propagation in austenitic welds: The MOSAICS project

Regulatory requirements enforce a volumetric inspection of welded components of nuclear equipments. However, the multi-pass austenitic welds are characterized by anisotropic and heterogeneous structures which lead to numerous disturbances of the ultrasonic beam. The MOSAICS project supported by the ANR (French National Research Agency) aims at matching various approaches to improve the prediction of the ultrasonic testing in those welds. The first stage consists in characterizing the weld structure (determination of the columnar grain orientation and measurements of elastic constants and attenuation coefficients). The techniques of characterization provide input data for the modeling codes developed in another task of the project. For example, a 3D version of the finite elements code ATHENA is developed by EDF R and D to take into account anisotropic texture in any direction. Semi-analytical models included in CIVA software are also improved to better predict the ultrasonic propagation in highly anisotropic and heterogeneous structures. The last stage deals with modeling codes validation based on experimental inspections on representative mock-ups containing calibrated defects. The objective of this paper is to give an overview of the MOSAICS project and to present specific results illustrating the various tasks.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6]
  1. EDF R and D, MMC department, Les Renardières, 77818 Moret sur Loing (France)
  2. DCNS CESMAN, 44620 La montagne (France)
  3. CEA LIST, 91191 Gif-sur-Yvette (France)
  4. LMA, Aix Marseille Université, CNRS, UPR 7051, F-13402 Marseille Cedex 20 (France)
  5. INSA Lyon, LVA laboratory, 69621 Villeurbanne (France)
  6. Extende, 91400 Orsay (France)
Publication Date:
OSTI Identifier:
22391213
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1650; Journal Issue: 1; Conference: 41. Annual Review of Progress in Quantitative Nondestructive Evaluation, Boise, ID (United States), 20-25 Jul 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; A CODES; ANISOTROPY; ATTENUATION; AUSTENITIC STEELS; C CODES; COMPUTERIZED SIMULATION; GRAIN ORIENTATION; INSPECTION; TEXTURE; ULTRASONIC TESTING; VALIDATION; WAVE PROPAGATION; WELDED JOINTS