Importância do ensaio por ultrassom para garantia da qualidade da solda

Abstract

Welding is a joining materials process and is the most important from the industrial point of view. Welding presents great versatility, related to the different processes, types of metal alloys and the variation of the thicknesses that can be joined. In, practically all welding processes thermal and mechanical energy are applied in the joint region, which tends to cause a series of mechanical effects (appearance of distortions and residual stresses) and metallurgical (changes in microstructure and properties). These effects, allied with the discontinuities in the welds, can impair the performance of welded components, and consequently cause their premature failure. Ultrasound testing has been an allied tool for detecting and analyzing these possible discontinuities, thus ensuring the reliability of the welded joint.