Evoluzione delle tecniche di controllo di getti di grandi dimensioni con metodo UT phased array.

This paper describes the new inspection methods of castings for oil and nuclear industry using phased array technique and dedicated probes. The phased array technique allows to considerably reduce the time of UT control thanks to a complete and exhaustive graphical representation of the analysis and thanks also to the use of a smaller number of transducers due to the versatility of the same. The time reduction joins a certain increase of the intrinsic quality of the PA technique, the ability to record the obtained results and the possibility of storage / display the performed exams. The PA technique is exactly at the halfway between the traditional ultrasonic inspection and the radiographic testing (often difficult to apply in service). It is possible to assume that, in the future, industrial radiography could be replaced by the phased array technique. [ABSTRACT FROM AUTHOR]