PSI - Issue 59

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2023) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2023) 000 – 000

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Procedia Structural Integrity 59 (2024) 182–189

© 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of DMDP 2023 Organizers © 202 3 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the conference Guest Editors Abstract The proposed computational model for crack propagation in high-temperature creep in metallic materials under the influence of a hydrogen environment and neutron irradiation is based on the first law of thermodynamics and the balance of the rates of change of energy components for an elementary crack propagation act in a metallic body under long-term static loading, high temperature, hydrogen-containing environments, and neutron irradiation. The application of the model for determining the residual life of bodies with cracks under the mentioned loading conditions in specified operational conditions is demonstrated using an analogy to Griffith's problem, which represents a two-dimensional problem for thin-walled structural elements. © 202 3 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the conference Guest Editors VII International Conference “In -service Damage of Materials: Diagnostics and Prediction ” (DMDP 2023) Propagation of high-temperature creep cracks in metals under the influence of hydrogen and neutron irradiation Oleksandr Andreykiv a , Iryna Dolinska b,c * , Sviatoslav Nastasiak a , Orest Svirchevskyi a a Ivan Franko National University of Lviv, 1, Universytetska str., Lviv, 79000, Ukraine VII International Conference “In -service Damage of Materials: Diagnostics and Prediction ” (DMDP 2023) Propagation of high-temperature creep cracks in metals under the influence of hydrogen and neutron irradiation Oleksandr Andreykiv a , Iryna Dolinska b,c * , Sviatoslav Nastasiak a , Orest Svirchevskyi a a Ivan Franko National University of Lviv, 1, Universytetska str., Lviv, 79000, Ukraine b Karpenko Physiko-Mechanical Institute of the NAS of Ukraine, 5, Naukova str., Lviv, 79060, Ukraine c Bydgoszcz University of Science and Technology, 7, Kaliskiego Ave., Bydgoszcz, 85-796, Poland b Karpenko Physiko-Mechanical Institute of the NAS of Ukraine, 5, Naukova str., Lviv, 79060, Ukraine c Bydgoszcz University of Science and Technology, 7, Kaliskiego Ave., Bydgoszcz, 85-796, Poland Abstract The proposed computational model for crack propagation in high-temperature creep in metallic materials under the influence of a hydrogen environment and neutron irradiation is based on the first law of thermodynamics and the balance of the rates of change of energy components for an elementary crack propagation act in a metallic body under long-term static loading, high temperature, hydrogen-containing environments, and neutron irradiation. The application of the model for determining the residual life of bodies with cracks under the mentioned loading conditions in specified operational conditions is demonstrated using an analogy to Griffith's problem, which represents a two-dimensional problem for thin-walled structural elements. Keywords: high-temperature creep; radiation embrittlement; hydrogen; stress intensity factor; fracture zone; pre-critical crack growth period. Keywords: high-temperature creep; radiation embrittlement; hydrogen; stress intensity factor; fracture zone; pre-critical crack growth period. 1. Introduction The safety of thermal and nuclear power plants depends on regular inspections of their critical components and the use of reliable non-destructive testing equipment. Additionally, the obtained data, such as the presence of defects 1. Introduction The safety of thermal and nuclear power plants depends on regular inspections of their critical components and the use of reliable non-destructive testing equipment. Additionally, the obtained data, such as the presence of defects

* Corresponding author. Tel.: +38 032 229 6875. E-mail address: ira_dolinska@ukr.net * Corresponding author. Tel.: +38 032 229 6875. E-mail address: ira_dolinska@ukr.net

2452-3216 © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the conference Guest Editors 2452-3216 © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the conference Guest Editors

2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of DMDP 2023 Organizers 10.1016/j.prostr.2024.04.027