10.14489/td.2026.11.pp.072-078

2026, 11 November

DOI: 10.14489/td.2026.11.pp.072-078

Mogilner L. Yu., Sysoev А. А., Zhukov A. D.
INFLUENCE OF HIGH-TEMPERATURE METAL DEGRADATION ON THE SPECTRAL COMPOSITION OF ULTRASONIC ECHO PULSES
(pp. 77-78)

Abstract. The results of an experimental study on the possibility of assessing degradation of 15Kh1M1F steel during thermal aging by analyzing the spectral composition of ultrasonic echo signals are presented. The relevance of the work is due to the need to extend the service life of power equipment at thermal and nuclear power plants to 60 years or more in the absence of comprehensive data on changes in metal properties under such conditions. Steel samples were subjected to isothermal holding at temperatures of 600, 625, 650 and 700 °C for 1.000 and 3.000 hours. For each regime, using direct combined piezoelectric transducers, the amplitude-frequency characteristics of a series of bottom echoes were obtained. It was found that with increasing temperature and aging duration, a progressive decrease in amplitude and a downward shift of the frequency maximum occur. Metallographic analysis confirmed the correlation between the spectral changes and structural degradation. The number of bottom echoes suitable for analysis was determined. It is shown that the spectral ultrasonic method can reliably detect structural changes in metal during thermal aging and can be used for non-destructive testing of the residual life of power equipment operating at high temperatures.

Keywords: thermal aging, spectral ultrasonic method, bottom echoes, amplitude-frequency characteristic, microstructure degradation, nondestructive testing.

+ - About the Authors Click to collapse

L. Yu. Mogilner (Bauman Moscow State Technical University, Moscow, Russia) E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.
А. А. Sysoev, A. D. Zhukov (JSC RPA “СNIITMASH”, Moscow, Russia) E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра. , Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.

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DOI: 10.14489/td.2026.11.pp.072-078

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