Question

Explain how defects in a metal block can be detected using ultrasound.

Answer 1

Ultrasound:
Ultrasound refers to a sound-wave imaging technique that generates images of organs, tissues, and various structures within the body.

Applications of ultrasound:
Ultrasound imaging employs sound waves to create visual representations of the internal body structures. It is utilized in diagnosing conditions such as internal organ discomfort, edema, and inflammation. Doctors can use ultrasounds to identify abnormalities in the heart, blood arteries, liver, pancreas, and kidneys. Ultrasound scans are commonly employed for monitoring the development of an unborn child.

Detection of defects in metal blocks using ultrasound:
In metal blocks, defects hinder the passage of ultrasound, causing reflection. This property is harnessed to identify flaws in metal blocks. In a flawless metal, ultrasonic waves travel as anticipated and are detected on the opposite end. In the presence of a defect, the waves are reflected back, indicating the absence of detection, and inferring a defect. Ultrasound is directed from one end of the metal block, with detectors affixed at the other end. If there is a faulty section in the metal block, ultrasound cannot traverse it entirely, resulting in the detector's failure to identify it. Consequently, ultrasound proves effective in detecting defects in metal blocks.