PSI - Issue 65

ScienceDirect Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2024) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2024) 000–000 Available online at www.sciencedirect.com

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 65 (2024) 83–91

The 17th International Conference on MECHANICS, RESOURCE AND DIAGNOSTICS OF MATERIALS AND STRUCTURES (MRDMS 2023) Determination of hydrogen concentration in metal shells Emelyanov I.G. a, b, *, Puzyrev P.I. b a Institute of Engineering Science, Ural Branch of the Russian Academy of Sciences, 34 Komsomolskaya St, Yekaterinburg, 620046, Russia b Ural Federal University, 19 Mira Street, Yekaterinburg, 620002, Russia Changes in the physical and mechanical properties of materials upon contact with hydrogen media is one of the factors that must be taken into account when assessing the strength of various metal structures during their operation in hydrogen media. This article proposes a mathematical model that makes it possible to determine the concentration of hydrogen, and, further, to take into account the influence of a hydrogen-containing environment on the mechanical properties of metals. To achieve this, the boundary problem of diffusion for a cylindrical shell is solved and the distribution of hydrogen concentration through the wall thickness at different times is determined. The resulting distribution of hydrogen concentration is determined using numerical methods. The research object is presented in the form of a shell of revolution, loaded with internal pressure of a hydrogen containing environment. Consequently, the stress state of such a shell structure during operation must be determined taking into account the changed mechanical properties of the material. © 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 MRDMS 2023 organizers Keywords: shells, mathematical modeling, diffusion process, finite element method, titanium alloys, hydrogen embrittlement, numerical simulation. The 17th International Conference on MECHANICS, RESOURCE AND DIAGNOSTICS OF MATERIALS AND STRUCTURES (MRDMS 2023) Determination of hydrogen concentration in metal shells Emelyanov I.G. a, b, *, Puzyrev P.I. b a Institute of Engineering Science, Ural Branch of the Russian Academy of Sciences, 34 Komsomolskaya St, Yekaterinburg, 620046, Russia b Ural Federal University, 19 Mira Street, Yekaterinburg, 620002, Russia Abstract Changes in the physical and mechanical properties of materials upon contact with hydrogen media is one of the factors that must be taken into account when assessing the strength of various metal structures during their operation in hydrogen media. This article proposes a mathematical model that makes it possible to determine the concentration of hydrogen, and, further, to take into account the influence of a hydrogen-containing environment on the mechanical properties of metals. To achieve this, the boundary problem of diffusion for a cylindrical shell is solved and the distribution of hydrogen concentration through the wall thickness at different times is determined. The resulting distribution of hydrogen concentration is determined using numerical methods. The research object is presented in the form of a shell of revolution, loaded with internal pressure of a hydrogen containing environment. Consequently, the stress state of such a shell structure during operation must be determined taking into account the changed mechanical properties of the material. © 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 MRDMS 2023 organizers Keywords: shells, mathematical modeling, diffusion process, finite element method, titanium alloys, hydrogen embrittlement, numerical simulation. © 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 MRDMS 2023 organizers Abstract

1. Introduction 1. Introduction

Thin-walled structural elements made of steel and titanium alloys are widely used in various branches of technology. Such structural elements typically operate under the influence of external mechanical and thermal loads, Thin-walled structural elements made of steel and titanium alloys are widely used in various branches of technology. Such structural elements typically operate under the influence of external mechanical and thermal loads,

* Corresponding author. Tel.: +7-922-207-3447. E-mail address: emelyanov.ig.2016@mail.ru * Corresponding author. Tel.: +7-922-207-3447. E-mail address: emelyanov.ig.2016@mail.ru

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 MRDMS 2023 organizers 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 MRDMS 2023 organizers

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 MRDMS 2023 organizers 10.1016/j.prostr.2024.11.013