Diagnostics of fracturing of structural materials based on parameters of electromagnetic radiation signals

• Published in: Russian journal of nondestructive testing 2010-10, Vol.46 (10), p.774-779
• Main Authors: Krivitskii, A. V., Bizyaev, A. A., Yakovitskaya, G. E., Karpov, A. Yu
• Format: Article
• Language: English
• Subjects: Amplitudes; Antennas; Characterization and Evaluation of Materials; Chemistry and Materials Science; Diagnostic systems; Emittance; Integrity; Magnetic and Electromagnetic Methods; Materials Science; Rock; Sensing devices; Structural Materials
• ISSN: 1061-8309; 1608-3385
• DOI: 10.1134/S1061830910100074

The methodological aspects and results of experimental studies allowing for remote evaluation of the integrity of structural materials under loading using the method of electromagnetic emission (EME) are considered. It is known that in the process of loading different materials systems of cracks that are formed in them emit acoustic and electromagnetic signals. Based on signal parameter variations, it is possible to predict an oncoming moment of disruption of their integrity. The EME is a remote method and does not require direct contact with an object under study, be it rock specimens or metal articles. It is proposed to use it for testing the integrity of metal articles. The first results of diagnostics of the integrity of metal rings made of different materials (steels, duraluminum, zirconium, and copper) using sensing devices, namely antennas of electrical and magnetic types, are presented. It is shown that when loaded different types of materials emit EME signals of different amplitudes whose level substantially exceeds the level of external disturbances and internal equipment noises. It is proposed to evaluate the integrity of different metal articles, especially those in nooks, based on increased amplitudes of EME signals.