Why is ultrasonic testing used in materials testing?

Ultrasonic testing is used in materials testing because, as a non-destructive method, it enables reliable quality assurance. Compared to other volumetric testing methods such as radiographic testing, UT is often a more cost-effective and flexible solution. It can detect internal defects like cracks, inclusions, or voids early without damaging the component. UT can be used on-site, requires no complex radiation protection measures, and provides immediate, interpretable results. Additionally, ultrasonic testing allows for precise wall thickness measurements and can be applied to a wide range of materials such as metals, plastics, and composites. These advantages make UT an essential part of non-destructive testing in both manufacturing and maintenance.