PSI - Issue 43

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

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Procedia Structural Integrity 43 (2023) 142–147

© 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 Tw stainless ste ls DIN 1.4307 and DIN 1.4306 were tested by an ultrasonic fatigue load ng device under ush-pull mod (stress ratio R = -1). Life-time c rv s were d term ed in the igh and very high cycle fatigue regions. The time d pendence of frequency was monitored and eval ated. At the beginning of t e test (up to 1  10 7 cycles), n increase of the fr quency was observed, followed by a slow fr qu ncy decrease. It relates to chang s of microstruc ure. No failure occurred in the region between 1  10 9 and 1  10 10 cycle . The steel 1.4306 xhibits a higher fat u life-time than he ste l 1.4307. This is caused by the difference in the chemical composition of the two steels, namely by the higher nickel content in the 1.4306 steel. © 20 23 The Authors. Published by Elsevier B.V. This is an ope 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. 1. Introduction Both stainless steels AISI 304L 1.4306 and 1.4307 are chrome-nickel steels with very low content of carbon. Thus, they are highly resistant t intergra ular c rrosion and suitable for food and chemical industry, in design and architecture as well as for outdoor constructions (Lo et al., 2009). Fatigue properties of these steels are analyzed in this paper, here we have focused on the mechanical properties in high cycle and v ry high cycle fatigue regions. The study follows our previous investigation of fatigue crack growth in AISI 304L steel (Jambor et al. 2021, Šmíd et al. 10th International Conference on Materials Structure and Micromechanics of Fracture Fatigue behavior of DIN 1.4307 and DIN 1.4306 stainless steels under high frequency loading Jan Klusák a* , Kamila Kozáková a,b , Michal Jambor a , Stanislav Seitl a 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 Abstract Two stainless steels DIN 1.4307 and DIN 1.4306 were tested by an ultrasonic fatigue loading device under push-pull mode (stress ratio R = -1). Life-time curves were determined in the high and very high cycle fatigue regions. The time dependence of frequency was monitored and evaluated. At the beginning of the tests (up to 1  10 7 cycles), an increase of the frequency was observed, followed by a slow frequency decrease. It relates to changes of microstructure. No failure occurred in the region between 1  10 9 and 1  10 10 cycles. The steel 1.4306 exhibits a higher fatigue life-time than the steel 1.4307. This is caused by the difference in the chemical composition of the two steels, namely by the higher nickel content in the 1.4306 steel. 10th International Conference on Materials Structure and Micromechanics of Fracture Fatigue behavior of DIN 1.4307 and DIN 1.4306 stainless steels under high frequency loading Jan Klusák a* , Kamila Kozáková a,b , Michal Jambor a , Stanislav Seitl a a Institute of Physics of Materials, Czech Academy of S ie ces, Žižkova 513/ 2, 16 00 Brno, Czech Republic b Faculty of Mechanical Engineering, Brno University of Technology, Technická 2896/2 , 616 69 Brno, Czech Republic Keywords: very high cyle fatigue; stainless steels; frequency changes; plastic deformation; Keywords: very high cyle fatigue; stainless steels; frequency changes; plastic deformation; 1. Introduction Both stainless steels AISI 304L 1.4306 and 1.4307 are chrome-nickel steels with very low content of carbon. Thus, they are highly resistant to intergranular corrosion and suitable for food and chemical industry, in design and architecture as well as for outdoor constructions (Lo et al., 2009). Fatigue properties of these steels are analyzed in this paper, where we have focused on the mechanical properties in high cycle and very high cycle fatigue regions. The study follows our previous investigation of fatigue crack growth in AISI 304L steel (Jambor et al. 2021, Šmíd et al.

* Corresponding author. Tel.: +420-532-290-348 E-mail address: klusak@ipm.cz * Correspon ing author. Tel.: +420-532-290-348 E-mail address: klusak@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 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.2022.12.249