Elevated temperature, gamma radiation, and geometric constraints inside dry storage casks for spent nuclear fuel represent a harsh environment for nondestructive inspection of the cask and require that the inspection be conducted with a robotic system. Electromagnetic acoustic transducers (EMATs) using non-contact ultrasonic transduction based on the Lorentz force to excite/receive ultrasonic w...

Continuous ultrasonic in-situ monitoring for industrial applications is difficult owing to 11 the high operating temperatures in industrial fields. It is expected that ultrasonic transducers 12 consisting of CaBi4Ti4O15(CBT)/Pb(Zr,Ti)O3(PZT) sol-gel composite could be one solution for 13 ultrasonic nondestructive testing (NDT) above 500 °C because no couplant is required and CBT has 14 a high C...

As a new nondestructive testing method, the accurate measurement of laser ultrasonic velocity is great significance for judging internal crack defects composites, calculating elastic modulus, residual stress and grain size. Based on finite element analysis thermoelastic effect induced vibration, time-of-flight method grating measuring are studied in this paper. Firstly, waveforms point source, ...

Abstract At present, the corrosion resistance of materials such as 316L stainless steel is mainly tested by electrochemical testing, which time-consuming, laborious and environmentally unfriendly. In this paper, laser ultrasonic detection technology, a rapid, non-destructive, pollution-free microstructure evaluation method used for steel, signals are filtered wavelet threshold denoising method....