Ultrasonic Testing (UT)
Similar to the ultrasonic principles used by an OB/GYN during pregnancy and naval SONAR, ultrasonic non-destructive testing method uses high frequency sound waves traveling through a part to detect discontinuities. If the sound traveling through a part hits material with different acoustical impedance, some of the sound will reflect back and received by the sending unit and will be represented as an indication on the screen. Knowing the velocity at which sound travels through a part, along with the time of travel will result in a distance to the indication (material with a change in acoustic impedance).
Sound waves are introduced to the part via a transducer made up of a piezoelectric crystal that converts electrical current to sound waves. The two most commonly used types of sound waves are Compression (Longitudinal or Straight Beam) and Shear wave (Transverse or Angle Beam).
Texas NDT Academy is your one stop shop for Ultrasonic Testing Method training.
Advantages of Ultrasonic Testing techniques:
- Detects surface and subsurface defects
- Only limited access needed
- Instant results
Disadvantages of Ultrasonic Testing Techniques:
- Training is more extensive than other methods
- More expensive than other methods
- Difficult to use on thin materials
- Part Geometry can cause complications
- Needs relatively smooth surface to couple transducer
- Must know velocity of part and have a reference to calibrate against for equipment set-up
It is evident from the observations above that Ultrasonic Testing training is a great idea. TXNDT facilitates an in depth ultrasonic testing training course. We conduct ultrasonic testing classes and our sole aim is that the trainee should receive quality ultrasonic inspection training.
A class at TXNDT is a excellent first step to mastery in ultrasonic testing techniques and a trainee would be able to immediately see the benefits in ultrasonic testing. Ultrasonic testing form the core of TXNDT methods. Some of the other courses offered are Magnetic Particle Testing, Liquid Penetrant Testing and Visual inspection.