PROPAGATION AND SCATTERING OF ULTRASONIC WAVES IN MEDIA WITH MICROPORES

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Abstract

Ultrasound investigations of the samples of the steam pipe elbow containing micro flaws have been performed, cut at different distances from the crack that appeared as a result of long-term operation. Changes in the velocities of longitudinal acoustic waves are determined depending on the porosity of the samples. The parameters of acoustic noise caused by multiple scattering of waves on microdefects in the samples are investigated. It is shown that the width of an estimated distribution of the probability density function of instantaneous values of an acoustic noise signal can be used as an informative parameter for microdamage ultrasonic monitoring of a medium. At the same time, accurate measurement of the velocity of ultrasonic wave is not required. Acoustic noise measurements can be performed using standard ultrasonic flaw detectors

About the authors

Anatoly B. Rinkevich

M.N. Mikheev Institute of Metal Physics UB RAS

Email: rin@imp.uran.ru
Russian Federation, 620108 Ekaterinburg, S. Kovalevskaya St., 18

Dmitry V. Perov

M.N. Mikheev Institute of Metal Physics UB RAS

Author for correspondence.
Email: peroff@imp.uran.ru
ORCID iD: 0000-0002-3785-4881
SPIN-code: 8906-5540
Scopus Author ID: 6603756499
ResearcherId: D-4415-2013
https://www.imp.uran.ru/?q=ru/user_card&sotrudnik=1529

Ph.D., senior scientist, laboratory of quantum nanospintronics

Russian Federation, 620108 Ekaterinburg, S. Kovalevskaya St., 18

Yulia Vladimirovna Korkh

M.N. Mikheev Institute of Metal Physics UB RAS

Email: korkh@imp.uran.ru
Russian Federation, 620108 Ekaterinburg, S. Kovalevskaya St., 18

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