Ultrasonic Oscillation Frequency
The number of oscillation cycles per second of an ultrasonic probe, which determines the resolution and penetration depth in the material.
Physical-Chemical Mechanism of Action
The sound wave frequency indicates how often the ultrasonic probe moves per second. A higher frequency means faster oscillation and allows better resolution of defects.
Metallurgical Relevance & Risks in Welding
A frequency that is too high can limit the penetration depth of the ultrasound, meaning deeper flaws may not be detected. A frequency that is too low, on the other hand, leads to poorer resolution and increases the likelihood of inspection errors.
Workshop Practice & Action Instructions
For optimal inspection, choose a sound wave frequency between 2 and 5 MHz. For thinner materials (up to 10 mm), a frequency of 5 MHz is suitable, while for thicker steel plates (over 30 mm), a frequency of 2 MHz is better. Ensure that the frequency matches the specific requirements of the material and the inspection.