Explain how defects in a metal block can be detected using ultrasound.
Answers
Answer:
Ultrasounds can be used to detect cracks and flaws in metal blocks. Ultrasonic waves are allowed to pass through the metallic block and detectors are used to detect the transmitted waves. If there is even a small defect, the ultrasound gets reflected back indicating the presence of the flaw or defect.
Answer:
Ultrasound are those waves which have frequency
greater than 20 kHz. Now, metal blocks are
subjected to ultrasound at one end and at the
other end, detectors are placed. If the metal block
does not contain any defect then ultrasound
travels through the block and is detected by the
detectors at the other end If the metal block has
any defect then from that region ultrasounds are
not detected and gets reflected back indicating
the presence of defect in the block