Crack Flank Reflection
Crack face reflection is the bouncing back of ultrasonic waves from the separated faces within a crack. It indicates the depth and extent of the crack in the weld.
Physical-Chemical Mechanism of Action
Ultrasonic waves are sent into the material and hit the separated surfaces of a crack. At these surfaces, the energy of the ultrasound is reflected, which is called reflection.
Metallurgical Relevance & Risks in Welding
Crack flank reflection is an important indicator of weld quality. It shows the depth and extent of cracks that have formed during or after welding. A strong reflection pattern indicates a high number or deep cracks, which can lead to destruction and potential failure of components.
Workshop Practice & Action Instructions
To detect and analyze crack flank reflection, ultrasonic testing (UT) is carried out. The UT machine sends ultrasonic waves into the material and records the reflection response. The practitioner must interpret the reflection patterns accurately and take appropriate measures to remove cracks or improve the weld.