USF-2000A

This ultrasonic fatigue testing system achieves a vibration rate of 20 kHz by applying a vibration generated by a Piezoelectric element and amplified by a horn. This not only significantly reduces cycle times, it also helps discover microscopic defects and inclusions in high-strength steel materials, which can cause fatigue fractures at the megacycle level.

https://www.shimadzu.com/an/products/materials-testing/fatigue-testingimpact-testing/usf-2000a/index.html