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Ultrasonic Testing

Ultrasonic Testing

Sound is the propagation of mechanical energy (vibrations) through solids, liquids and gases. The ease with which the sound travels, however, is dependent upon the detailed nature of the material and the pitch (frequency) of the sound. At ultrasonic frequencies (20,000 Hz), Sound propagates well through most elastic or near-elastic solids and liquids, particularly those with low viscosities.

 

Common Wave Mode

  • Longitudinal Wave
  • Transverse Wave
  • Surface (Guided)
  • Plate (Guided)

Testing Techniques

  • Pulse-Echo technique
  • Through Transmission
  • Pitch and Catch
  • Tandem
  • Resonance
  • Immersion testing

Equipment’s and Accessories

Epoch 650                                       GE USM Go+ 27MG

38 DL Plus                                 Ultrasonic Transducer Cable Connectors

 

Applications

Ultrasonic testing is used for quality control and materials testing in all major industries. This includes Ultrasonic testing of castings, forgings, plates, extruded components, weld joints, electrical and electronic component manufacturing, production of steel, aluminum and titanium, fabrication of structures such as air frames, pressure vessels, ships, bridges, motor vehicles, machinery and jet engines.

In service ultrasonic testing for preventive maintenance is used for detecting impending failure of rail road rolling stock axles, press columns, earth-moving equipment, mill rolls, mining equipment and other machines and components. The flaws to be detected include voids, cracks, inclusions, pipe, laminations, bursts and flakes. They may be inherent in the raw materials, may result from fabrication and heat treatment, or may occur in service from fatigue, corrosion or other causes.

Ultrasonic testing can also be used to measure thickness of metal sections during manufacturing and maintenance inspections.

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