NDT techniques based on phased array technology are more and more applied in various industrial context. The advantages of basic phased arrays functions are now quite well known. However new promising techniques still remain required to improve detection, and especially characterization of flaws. These improvements are directly dependent on the application of relevant physical model connected to specific phased array algorithms. The development of such simulation and processing tools constitutes one of the major axis research of CEA NDT laboratory. In this communication, after having briefly recalled the propagation and beam-defect interaction models, on which are based the CEA tools, we present specific phased array algorithms and show some applications for complex specimen and inspection configurations. These applications deal with the design of transducers and the computation of adapted delay laws, the prediction of the ultrasonic beams generated by the transducer. We also present some simulations which allow to estimate the inspection coverage rate of the component. At last, the prediction of defects responses received by the array is used to apply specific reconstruction algorithms to accurately localize and to characterize flaws.
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