Non-Destructive Testing - Ultrasonic Testing

Question 1

What is the definition of Ultrasonic (US) testing?

Answer 1

High frequency sound waves are transmitted into a material to detect imperfections or to locate changes in material properties

Question 2

The most commonly used Ultrasonic testing technique is the Pulse Echo Method. What is the process for carrying out this testing method?

Answer 2

• sound is introduced into a test object
• reflections from internal imperfections or changes in geometry are returned to the receiver
• The time intervals between transmissions and receptions of pulses show the internal structure of the materiel

Question 3

What is special about longitudinal waves?

Answer 3

Only type of waves which can travel through liquid

Question 4

How are shear waves generated?

Answer 4

By passing the ultrasound beam through the material at an angle

Question 5

What does an angle beam transducer do?

Answer 5

Introduces a refractive shear wave into the test material

Question 6

How does an angle beam transducer improve flaw detection?

Answer 6

It allows sound wave to enter material from the side so improves flaw detection around welds

Question 7

What type of components can an angle beam transducer analyse?

Answer 7

Flat sheets
Plates
Pipes and tubing