What type of testers are used to locate internal flaws or cracks in metal?

Ultrasonic testers are an effective method for locating internal flaws or cracks in metal. This testing technique employs high-frequency sound waves that are transmitted into the material being examined. When these sound waves encounter a flaw, such as a crack or void, they reflect back to the transducer, where the time it takes for the echoes to return is analyzed. This time-of-flight measurement, along with the amplitude of the echoes, helps technicians determine the size, location, and nature of the internal imperfections.

Ultrasonic testing is particularly valuable because it can penetrate various types of metals and detect flaws without requiring any contact with the surface. This makes it suitable for testing intricate components and large structures, contributing to maintaining the integrity and safety of metal parts in numerous applications.