Non-destructive material testing in welding: ultrasonic scanning

Ultrasonic scanning is a non-destructive method employed in several fields, for instance, in medicine. Ultrasonic testing is also relevant for detecting flaws in products and structures. One application example is the inspection of welded structures. This chapter gives a brief overview of the importance of ultrasonic scanning in the characterization of welded structures, starting with general introductory content on ultrasonic scanning. Then, the non-destructive characterization of welded parts is described, from the basic principles to the instrumentation. The several ultrasonic techniques employed for welded parts will also be described and analyzed. Finally, a brief overview of the relevant standards is given.