PSI - Issue 51

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

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

Procedia Structural Integrity 51 (2023) 145–151

© 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 responsibility of the scientific committee of the ICSID 2022 Organizers Abstract In this study, fatigue lifetime of two types of specimens with different volumes (given by the gauge length and the diameter of the central part of the specimen) subjected to high-frequency loading is investigated. Studied materials are austenitic stainless steels 1.4306 and 1.407, both commonly known as AISI 304L. An ultrasonic testing machine working at frequency of 20 kHz was used to reach very high cycle fatigue region. Fatigue tests were carried out under uniaxial symmetric tension/compression loading (ܴ ൌ െͳ ) at room temperature. The study includes a microstructural description of investigated materials, fracture surface analysis, and conclusions. © 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 responsibility of the scientific committee of the ICSID 2022 Organizers Keywords: Risk volume; fatigue; stainless steel; ultrasonic pulsator 1. Introduction Several factors influence the fatigue strength of metallic materials subjected to high-frequency loading. Besides load factor, stress ratio, presence of notches, surface finishing, and environment, fatigue strength can be significantly influenced by the size of the specimen (Paolino et al., 2014; Tridello et al., 2021). In general, it can be assumed that the fatigue life decreases with increasing specimen size (Furuya, 2011, 2010, 2008; Klusák et al., 2021; Paolino et al., Abstract In this study, fatigue lifetime of two types of specimens with different volumes (given by the gauge length and the diameter of the central part of the specimen) subjected to high-frequency loading is investigated. Studied materials are austenitic stainless steels 1.4306 and 1.407, both commonly known as AISI 304L. An ultrasonic testing machine working at frequency of 20 kHz was used to reach very high cycle fatigue region. Fatigue tests were carried out under uniaxial symmetric tension/compression loading (ܴ ൌ െͳ ) at room temperature. The study includes a microstructural description of investigated materials, fracture surface analysis, and conclusions. © 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 responsibility of the scientific committee of the ICSID 2022 Organizers Keywords: Risk volume; fatigue; stainless steel; ultrasonic pulsator 1. Introduction Several factors influence the fatigue strength of metallic materials subjected to high-frequency loading. Besides load factor, stress ratio, presence of notches, surface finishing, and environment, fatigue strength can be significantly influenced by the size of the specimen (Paolino et al., 2014; Tridello et al., 2021). In general, it can be assumed that the fatigue life decreases with increasing specimen size (Furuya, 2011, 2010, 2008; Klusák et al., 2021; Paolino et al., 6th International Conference on Structural Integrity and Durability (ICSID 2022) The effect of risk volume on the fatigue life of stainless steels subjected to high-frequency loading Kamila Kozáková a,b,* , Jan Klusák a , Stanislava Fintová a , Stanislav Seitl a,c 6th International Conference on Structural Integrity and Durability (ICSID 2022) The effect of risk volume on the fatigue life of stainless steels subjected to high-frequency loading Kamila Kozáková a,b,* , Jan Klusák a , Stanislava Fintová a , Stanislav Seitl a,c a Institute of Physics of Materials, Czech Academy of Sciences, Žižkova 513/22, 616 00 Brno, Czech Republic b Faculty of Mechanical Engineering, Brno University of Technology, Technická 2896/2, 616 69 Brno, Czech Republic c Faculty of Civil Engineering, Brno University of Technology, Veve ř í 331/95, 602 00 Brno, Czech Republic a Institute of Physics of Materials, Czech Academy of Sciences, Žižkova 513/22, 616 00 Brno, Czech Republic b Faculty of Mechanical Engineering, Brno University of Technology, Technická 2896/2, 616 69 Brno, Czech Republic c Faculty of Civil Engineering, Brno University of Technology, Veve ř í 331/95, 602 00 Brno, Czech Republic

* Corresponding author. Tel.: +420-532-290-367. E-mail address: kozakova@ipm.cz * Corresponding author. Tel.: +420-532-290-367. E-mail address: kozakova@ipm.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 responsibility of the scientific committee of the ICSID 2022 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 responsibility of the scientific committee of the ICSID 2022 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 responsibility of the scientific committee of the ICSID 2022 Organizers 10.1016/j.prostr.2023.10.081