Ultrasonic Testing 

Ultrasonic Testing is family of Non Destructive Testing Techniques best on the propagation of ultrasonic waves in the object or material tested.

There are two methods of receiving the ultrasound waveform, reflection and attenuation. In reflection (or pulse-echo) mode, the transducer performs both the sending and the receiving of the pulsed waves as the “sound” is reflected back to the device. Reflected ultrasound comes from an interface, such as the back wall of the object or from an imperfection within the object. The diagnostic machine displays these results in the form of a signal with an amplitude representing the intensity of the reflection and the distance, representing the arrival time of the reflection.

How does Ultrasonic Testing work?
A probe sends ultrasonic waves into the material, and the reflected waves help identify defects like cracks, voids, or thickness variations.
UT is commonly used in industries such as aerospace, automotive, construction, and oil & gas for quality control and structural integrity checks.
UT is excellent for detecting internal flaws, but surface defects may require other NDT methods like Magnetic Particle Testing (MPT) or Dye Penetrant Testing (DPT).
Yes, UT is a completely safe and non-invasive testing method with no harmful radiation exposure.
UT is effective on metals, composites, plastics, and ceramics, making it a versatile testing method for various industries.

In attenuation (or through-transmission) mode, a transmitter sends ultrasound through one surface, and a separate receiver detects the amount that has reached it on another surface after traveling through the medium. Imperfections or other conditions in the space between the transmitter and receiver reduce the amount of sound transmitted, thus revealing their presence.

Using the Couplant increases the efficiency of the process by reducing the losses in the ultrasonic wave energy due to separation between the surfaces.

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