Inverse problem for material analysis by ultrasound

Type : Publication
Auteur(s) :  HAKEM MAAMAR
Année :  2013
Domaine : Sciences des matériaux
Revue : In book: Non destructive testing of materials and structures, Chapter: Ndt for material characterization: metallurgical perspective, Edition: Rilem Bookseries
Résumé en PDF :  (résumé en pdf)
Fulltext en PDF :  (.pdf)
Mots clés :  PACS: 43.25.Hg ; 43.35.Zc ; 43.60.Hj ; 43.60, Multiscale analysis • Structural noise • Ultrasonic NDT/NDE • Wavelet

Résumé : 

Internal defects detection by ultrasound non destructive testing is widely used in industry. Ultrasonic time signal data are diffi cult to interpret since they require continuous signal analysis for each point of the piece. Inverse problem in materials analysis puts some challenges because the composition variables are both discrete and continuous and because the engineering properties are highly nonlinear functions. In this paper we address the non linear features of back scatted ultrasonic waves from steel plate, for understanding its micro structural behaviour. The experiments show a challenging interface between material properties, calculations and ultrasonic wave propagation modelling