Frequency response measurements of shear-wave transducers employed for ultrasonic in-service inspection of nuclear components

摘要

The laboratory measurements of centre frequency and relative bandwidth of medium damped shear-wave transducers of 2.25, 3.5 and 5 MHz depend on electronic set-up, target nature, ultrasonic path, transducer design, wedge nature and refraction angle. The maximum deviations exceeded 10% tolerance. A more realistic experimental value of 20% bandwidth tolerance is proposed. Some recommendations for a better and reproducible set-up, and comments on ASME XI requirements are also presented.