Отправить статью по E-mail Examining the Experience of Revealing Delayed Deformation Corrosion Cracking
- Авторы: Razygraev A.N.1, Razygraev N.P.1, Dikov I.A.2
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Учреждения:
- State Research Center of the Russian Federation CNIITMASH
- All-Russian Scientific Research Institute of Aviation Materials
- Выпуск: Том 53, № 4 (2017)
- Страницы: 295-303
- Раздел: Acoustic Methods
- URL: https://journals.rcsi.science/1061-8309/article/view/181331
- DOI: https://doi.org/10.1134/S1061830917040076
- ID: 181331
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Аннотация
The problem of skipping iron-oxide–filled damages in the welding junctions between the collector and Dn1200 branch pipe of the PGV-1000 steam generator in a VVÉR-1000 reactor facility is considered. The mechanism of crack nucleation and development is described. A hypothesis that cracks filled with corrosion deposits exhibit minimum reflectivity has been proposed and confirmed. Results of theoretical research into transmission and reflection of ultrasonic waves in the presence of a thin layer of corrosion products surrounded by pearlitic steel are provided. The reflectances of longitudinal and transverse waves from corrosion damages have been calculated and proved the viability of the hypothesis.
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A. Razygraev
State Research Center of the Russian Federation CNIITMASH
Автор, ответственный за переписку.
Email: ANRazygraev@cniitmash.com
Россия, Moscow, 115088
N. Razygraev
State Research Center of the Russian Federation CNIITMASH
Email: ANRazygraev@cniitmash.com
Россия, Moscow, 115088
I. Dikov
All-Russian Scientific Research Institute of Aviation Materials
Email: ANRazygraev@cniitmash.com
Россия, Moscow, 105005
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