Studying Sources of Acoustic Emission during the Cooling of a Weld Seam with the Use of Cluster Analysis

摘要

Acoustic-emission (AE) signals localized during cooling of a weld seam were analyzed. The hazard degree of flaws (faulty fusions, cracks in the root of a weld seam, etc.) was studied using cluster analysis in the parameters of AE signals. Flaws were simulated via introduction of titanium and dur-alumin inserts into a weld seam. The results of metallographic investigations of specimens with artifi-cial and actual flaws were analyzed. Localization of AE signals was performed for the specimens stud-ied, and a time distribution taking into account the clustering of the total count and energy of AE sig-nals was constructed.