PSI - Issue 43

Jan Klusák et al. / Procedia Structural Integrity 43 (2023) 142–147 Author name / Structural Integrity Procedia 00 (2022) 000 – 000

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4. Conclusions High frequency fatigue tests were performed on stainless steels DIN 1.4307 and DIN 1.4306. Fatigue lifetime was analyzed, where slightly higher number of cycles to fracture was observed for 1.4306 steel. The same steel exhibited higher fatigue limit. Frequency monitoring have shown the steep increase of the resonance frequency during 10 million of cycles (the first 8 minutes of the test) followed by the slow frequency decrease. This behavior is analogical to the changes of stress amplitudes during low frequency loading, and it is connected to dislocation density increase and the localization of plastic deformation. Knowledge of fatigue response of the studied stainless steels can contribute to more reliable design of steel structures. Acknowledgement Authors are grateful for the support of the research through the project Influence of material properties of stainless steels on reliability of bridge structures, project No. 20-00761S of the Czech Science Foundation. References Jambor M., Vojtek T., Pokorný P., Šmíd M. (2021) Effect of Solution Annealing on Fatigue Crack Propagation in the AISI 304L T RIP Steel. Materials 14, 1331 Kala Z., Omishore A., Seitl S., Krejsa M., Kala J. (2017) The effect of skewness and kurtosis on the probability evaluation of fatigue limit states (2017) International Journal of Mechanics, 11, 166 – 175 Klusák J., Horník V., Lesiuk G., Seitl S.: Comparison of high - and low-frequency fatigue properties of structural steels S355J0 and S355J2. Fatigue Fract. Eng. Mater. Struct. 44 (2021) 3202-3213 Krejsa, M., Brozovsky, J., Lehner, P., Seitl, S. Kala, Z. (2018) Stochastic analysis for short edge cracks under selected loa ds”, AIP Conference Proceedings 1978, 150006. Lo, K.H., Shek, C.H. and Lai, J.K.L., 2009, Recent developments in stainless steels, Mater. Sci. Eng. R Rep., 65, pp. 39-104. Müller -Bollenhagen, C., Zimmermann, M., Christ, H.-J., 2010. Very High Cycle Fatigue Behaviour of Austenitic Stainless Steel and the Effect of Strain-Induced Martensite. Int. J Fatigue 32, 936 – 942. Seitl, S., Pokorný, P., Klusák, J., Duda, S., Lesiuk, G. (2022). Effect of Specimen Thickness on Fatigue Crack Growth Resista nce in Paris Region in AISI 304 STEEL Fatigue and Fracture of Materials and Structures. Structural Integrity, Vol. 24. Springer Seitl S., Miarka P., Klusák J., Fintová S., Kunz L. (2018), Comparison of the fatigue crack propagation rates in S355 J0 and S355 J2 steel grades, Key Engineering Materials, 784, 91 – 96 Seitl S. , Miarka P., Klusák J., Kala Z., Krejsa M., Blasón S., Canteli A.F. (2018 a) Evaluation of fatigue properties of S355 J0 steel using ProFatigue and ProPagation software, Procedia Structural Integrity, 13, 1494 – 1501 Šmíd, M., Kuběna, I., Jambor, M., Fintová, S., 2021, Effect of solution annealing on low cycle fatigue of 304L stainless steel, Materials Science and Engineering: A, Volume 824, 141807. Trávníček L., Kuběna I., Mazánová V., Vojtek T., Polák J., Hutař P., Šmíd M. (2021) Advantageous Description of Short Fatigue Crack Growth Rates in Austenitic Stainless Steels with Distinct Properties. Metals 11, 475 Tamura, I., 1982. Deformation-Induced Martensitic Transformation and Transformation-Induced Plasticity in Steels. Metal Sci. 16, 245 – 253.