PSI - Issue 57

Jan Papuga et al. / Procedia Structural Integrity 57 (2024) 79–86 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

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5. Conclusion The paper summarized experimental results of in-phase (IP) and out-of-phase (OP) loading of AM AlSi10Mg on special cavity specimens with the as-built surface quality, and heat threated to 240°C for 6 hours and cooled on air. All specimens were manufactured on one platform in the upright position. The experiments were conducted under force control with fully reversed R =-1 loading in all cases. The quality of the fatigue strength estimation by four different multiaxial criteria (QCP – quadratic critical plane criterion, by Liu and Zenner - LZ, by Dang Van - DV, and by Crossland - CROSS) was evaluated and checked on the experimental results. None of the criteria works universally for both cases: 1. QCP and LZ criteria tend to provide too non-conservative results for the highest lifetimes for the IP configuration. For the OP case, their response is good. 2. On the contrary, Dang Van and Crossland criteria are slightly better (but still non-conservative) for IP loading, but their performance in the OP case is significantly worse. 3. Due to too limited scope of tests, it is unclear if this is a universal response to multiaxial loading or if this could be related to AM-induced microstructural issues. Acknowledgements The authors acknowledge the support by the Czech Ministry of Education, Youth and Sports within the LUABA22071 project, by the Bavarian-Czech Academic Agency (BTHA-JC-2022-30 project), by the Grant Agency of the Czech Technical University in Prague within the SGS23/156/OHK2/3T/12 project, by ESIF, EU Operational Programme Research, Development and Education, from the Center of Advanced Aerospace Technology (CZ.02.1.01/0.0/0.0/16_ 019/0000826), Faculty of Mechanical Engineering, Czech Technical University in Prague, and by the Czech Science Foundation within the 23-05338S project. This work was also supported by FCT, through IDMEC, under LAETA, project UIDB/50022/2020. References Brandl, E., Heckenberger, E., Holzinger, V., Buchbinder, D., 2012. Additive manufactured AlSi10Mg samples using Selective Laser Melting (SLM): Microstructure, high cycle fatigue, and fracture behavior. Materials & Design 34, 159–169. Crossland, B., 1956. Effect of large hydrostatic pressure on the torsional fatigue strength of an alloy steel, in: Proc Int Conf on Fatigue of Metals, Institution of Mechanical Engineers, London, pp. 138–149. Dang Van, K., 1973. Sur la résistance à la fatigue des métaux. Sci. Techniq. L’Armement. 47, 647. Fatemi, A., Molaei, R., 2020. Novel specimen geometries for fatigue testing of additive manufactured metals under axial, torsion, and combined axial-torsion loadings. International Journal of Fatigue 130, 105287. Foti, P., Razavi, N., Fatemi, A., Berto, F., 2023. Multiaxial fatigue of additively manufactured metallic components: A review of the failure mechanisms and fatigue life prediction methodologies. Progress in Materials Science 137, 101126. Kalluri, S., Bonacuse, P. J., 2000, ASTM International, Symposium on Multiaxial Fatigue and Deformation: Testing and Prediction, Multiaxial fatigue and deformation: testing and prediction. ASTM, W. Conshohocken, PA, 2000. Kohout, J., Věchet, S., 2001. A new function for fatigue curves characterization and its multiple merits. International Journal of Fatigue 23, 175– 183. Murakami, Y., Masuo, H., Tanaka, Y., Nakatani, M., 2019. Defect Analysis for Additively Manufactured Materials in Fatigue from the Viewpoint of Quality Control and Statistics of Extremes. Procedia Structural Integrity 19, 113–122 Papuga, J., 2011. A survey on evaluating the fatigue limit under multiaxial loading. International Journal of Fatigue 33, 153–165. Papuga, J., Halama, R., 2019. Mean stress effect in multiaxial fatigue limit criteria. Archive of Applied Mechanics 89, 823–834. Papuga, J., Healey, R. A., 2019. Who Should Bear Responsibility? Benchmarks in Fatigue Prediction. Bulletin ČSM , 18–42. Papuga, J., Nesládek, M., Jurenka, J., 2019, Differences in the response to in-phase and out-of-phase multiaxial high-cycle fatigue loading. Frattura ed Integrita Strutturale 13, 163–183. Papuga, J., Cízová, E., Karolczuk, A., 2021. Validating the Methods to Process the Stress Path in Multiaxial High-Cycle Fatigue Criteria. Materials 14. Papuga, J., Nesládek, M., Hasse, A, Cízová, E., Suchý, L., 2022. Benchmarking Newer Multiaxial Fatigue Strength Criteria on Data Sets of Various Sizes. Metals. 12. Zenner, H., Simbürger, A., Liu, J., 2000. On the fatigue limit of ductile metals under complex multiaxial loading, International Journal of Fatigue. 22, 137–145.