Ultrasonic Testing

Ultrasonic testing (UT) is a family of non-destructive testing techniques based on the propagation of ultrasonic waves in the object or material tested. In most common UT applications, very short ultrasonic pulse-waves with center frequencies ranging from 0.1-15 MHz, and occasionally up to 50 MHz, are transmitted into materials to detect internal flaws or to characterize materials. A common example is ultrasonic thickness measurement, which tests the thickness of the test object, for example, to monitor pipework corrosion.

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Ultrasonic Testing Services

Ultrasonic testing is often performed on steel and other metals and alloys, though it can also be used on concrete, wood and composites, albeit with less resolution. It is used in many industries including steel and aluminium construction, metallurgy, manufacturing, aerospace, automotive and other transportation sectors.

Advantages

  • 1. High penetrating power, which allows the detection of flaws deep in the part.
  • 2. High sensitivity, permitting the detection of extremely small flaws
  • 3. Only two nonparallel surfaces need to be accessible.
  • 4. 8. Results are immediate. Hence on the spot decisions can be made.
  • 5. Some capability of estimating the size, orientation, shape and nature of defects.
  • 7. Capable of portable or highly automated operation.

Ultrasonic Flaw Detection

In ultrasonic testing, an ultrasound transducer connected to a diagnostic machine is passed over the object being inspected. The transducer is typically separated from the test object by a couplant (such as oil) or by water, as in immersion testing. However, when ultrasonic testing is conducted with an Electromagnetic Acoustic Transducer (EMAT) the use of couplant is not required.

Ultrasonic Testing Projects

Ultrasonic testing is often performed on steel and other metals and alloys, though it can also be used on concrete, wood and composites, albeit with less resolution.

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