Assessment of the Structural State of Dissimilar Welded Joints by the Acoustic Emission Method

In this study, we investigated defect detection in dissimilar welded joints by the acoustic emission (AE) method. The study objects were carbide and decarburized interlayers, which are formed at fusion boundary between austenitic pearlitic steels. Diffusion as a structural defect, usually have microscopic dimensions cannot be detected using conventional non-destructive testing (NDT) methods. regard, AE method is promising approach to diagnose metal with complex structure detect defects. paper, signatures obtained from defect-free specimens diffusion interlayers analyzed. We found that signature for defective has significant differences, makes it possible identify descriptors corresponding presence of joints.