PSI - Issue 43

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000

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Procedia Structural Integrity 43 (2023) 294–299

© 2023 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 the responsibility of MSMF10 organizers. © 20 23 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under the responsibility of MSMF10 organizers. Abstract Despite the current tendencies towards decarbonization of th e ergy sector, it is still nec ssary to maintain th lifetime of existing coal-fired power plants. Austenitic stainless steels belo g among m t rials used in energetics, i this ase, SUPER 304H (X10CrNiCuNb18-9-3). This steel is u ed for the experiment that simulates real operating conditions, specifically high t mperature (700 °C) and co nstant inner pressure (25 MPa), which is induced by inserting a distilled water medium before sealing. This work deals with th evaluation of the micro tr ctu e a d m chanical properties of the SUPER 304H specimens, both with and wit out inner ressure. All the specimens underwent the same long-term expo ure in a form of laboratory annealing. The mec anical properties were evaluated by perf rming the tensile, impact and hardness tests and microstructure was characterized by light optical microscopy and scanning electron microscopy. © 20 23 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under the responsibility of MSMF10 organizers. 10th International Conference on Materials Structure and Micromechanics of Fracture Effect of Internal Pressure on Microstructural and Mechanical Properties of X10CrNiCuNb18-9-3 (SUPER 304H) Austenitic Stainless Steel Lucie Pilsová a,b, * , Marie Ohanková a , Vladimír Mára b , Jan Krčil b , Jakub Horváth b a UJP PRAHA a.s., Nad Kamínkou 1345, 156 10 Prague – Zbraslav, Czech Republic b Czech Technical University in Prague, Faculty of Mechanical Engineering, Department of Materials Engineering, Karlovo náměstí 13, 120 00 Prague, Czech Republic Abstract Despite the current tendencies towards decarbonization of the energy sector, it is still necessary to maintain the lifetime of existing coal-fired power plants. Austenitic stainless steels belong among materials used in energetics, in this case, SUPER 304H (X10CrNiCuNb18-9-3). This steel is used for the experiment that simulates real operating conditions, specifically high temperature (700 °C) and co nstant inner pressure (25 MPa), which is induced by inserting a distilled water medium before sealing. This work deals with the evaluation of the microstructure and mechanical properties of the SUPER 304H specimens, both with and without inner pressure. All the specimens underwent the same long-term exposure in a form of laboratory annealing. The mechanical properties were evaluated by performing the tensile, impact and hardness tests and microstructure was characterized by light optical microscopy and scanning electron microscopy. 10th International Conference on Materials Structure and Micromechanics of Fracture Effect of Internal Pressure on Microstructural and Mechanical Properties of X10CrNiCuNb18-9-3 (SUPER 304H) Austenitic Stainless Steel Lucie Pilsová a,b, * , Marie Ohanková a , Vladimír Mára b , Jan Krčil b , Jakub Horváth b a UJP PRAHA a.s., Nad K mínkou 1345, 156 10 Pragu – Zbraslav, Czech Republ c b Czech Technical University in Prague, Faculty of Mechanical Engineering, Department of Materials Engineering, Karlovo náměstí 13, 120 00 Prague, Czech Republic

Keywords: Austenitic stainless steel; microstructure; reheaters; superheaters; internal pressure. Keywords: Austenitic stainless steel; microstructure; reheaters; superheaters; internal pressure.

* Corresponding author. Tel.: +420-22435-7249. E-mail address: lucie.pilsova@fs.cvut.cz * Correspon ing author. Tel.: +420-22435-7249. E-mail address: lucie.pilsova@fs.cvut.cz

2452-3216 © 2023 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 the responsibility of MSMF10 organizers. 2452-3216 © 2023 The Authors. Published by Elsevier B.V. This is an ope access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under the responsibility of MSMF10 organizers.

2452-3216 © 2023 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 the responsibility of MSMF10 organizers. 10.1016/j.prostr.2022.12.274