10.14489/td.2021.06.pp.004-014

2021, 06 June

DOI: 10.14489/td.2021.06.pp.004-014

Danilov V. N., Ushakov V. M.
RESEARCH OF STRUCTURE OF SAMPLES OF METAL OF POWER PIPELINES BY ULTRASONIC METHOD
(pp. 4-14)

Abstract. Results of researches of structure of metal of elements of power pipelines before operation by a ultrasonic method are submitted. With use before the developed algorithm of definition of factor of attenuation of longitudinal waves owing to dispersion on structural elements calculations of amplitude of a bottom echo – signal in metal with various in average size of a grain, distribution of grains on the sizes and factor of anisotropy are executed. Influence of parameters of metal on amplitude of an echo – signal is shown. Comparison of theoretical calculation with the data of experiment and results metallography for five samples of elements of pipelines from two grades of metal with a various operating time is carried out and their satisfactory concurrence is shown.

Keywords: structure of metal, ultrasonic method, bottom echo, dispersion of ultrasound, the average size of a grain, longitudinal wave, normal probe.

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V. N. Danilov, V. M. Ushakov (JSC “RPA “CNIITMASH) 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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