Ultrasonic testing (UT) is a non-destructive testing (NDT) method used to evaluate the properties of materials, detect flaws, and measure thickness. It employs high-frequency sound waves, typically above 20 kHz, which are beyond the audible range for humans. ### Key Aspects of Ultrasonic Testing: 1. **Principle**: UT works by transmitting ultrasonic waves into a material and analyzing the reflected waves.
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