Modeling the Effect of Hydrogen Charging at Elevated Temperatures on the Strength of NPP Steam Generator Pipes Steel

The operating conditions for modeling and evaluating the invariant strength characteristics of steam generator 22K steel at elevated temperature and the effect of gaseous hydrogen are analyzed. The importance of using the energy criterion, which takes into account the change in true stresses and str...

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Bibliographic Details
Published in:Materials science (New York, N.Y.) N.Y.), 2023, Vol.58 (4), p.453-459
Main Authors: Ivanytskyi, Ya. L., Hvozdiuk, M. M., Klymenko, D. V., Hrynenko, M. V., Maksymenko, O. P.
Format: Article
Language:English
Subjects:
Austenitic stainless steels
Boilers
Characterization and Evaluation of Materials
Chemistry and Materials Science
Elastic deformation
High temperature
Hydrogen charging
Internal pressure
Limit states
Materials Science
Modelling
Plastic deformation
Solid Mechanics
Structural Materials
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Summary:The operating conditions for modeling and evaluating the invariant strength characteristics of steam generator 22K steel at elevated temperature and the effect of gaseous hydrogen are analyzed. The importance of using the energy criterion, which takes into account the change in true stresses and strains under the action of internal pressure at high temperatures of the hydrogen environment, is demonstrated. Diagrams of 22K steel limit state under the combined effect of mechanical load and elevated temperatures are plotted. An approach to determining the degree of pipeline damage under operating conditions based on the ratio of elastic-plastic deformation energy and specific fracture energy of 22K steel is proposed.
ISSN:1068-820X
1573-885X
DOI:10.1007/s11003-023-00684-4