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Ultrasonic Testing

This is another NDT method which works on principle of sound reflection, refracted through the material like steel, aluminium, and copper etc.

Ultrasonic waves are generated by piezoelectric material called traducers which convert electric energy to mechanical vibrations and vice versa.

The most commonly used frequency range for industrial inspection is 0.5 - 25 mega hertz.

This method has various techniques such as ....

  • Pulse-echo technique
  • Transmission Technique
  • Resonance Technique ( Used in Digital Thickness Gauging)

The method is very much suitable for all type of material but only operator skill is very much essential.