PSI - Issue 77

Martin Matušů et al. / Procedia Structural Integrity 77 (2026) 127 –134 Author name / Structural Integrity Procedia 00 (2025) 000 – 000

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• Fatigue life exhibits clear spatial dependence on the build platform, with distinct zones showing significantly lower fatigue resistance. • From 21 regions observed on the build plate, 4 were identified to produce more than 30% of specimens statistically classified as outliers due to their reduced fatigue performance. • The combined use of the Kohout & Věchet fatigue model and Weibull statistical analysis provides a powerful method for identifying fatigue outliers and characterizing spatial trends. • These insights underscore the necessity for manufacturers to consider the product position on the build platform within process design and quality assurance to enhance the reliability of additively manufactured structural components. It can also serve as feedback to producers of 3D printers to be aware of potential “blind spots” of their products. This work advances the understanding of spatial variability in fatigue performance and paves the way for more targeted process control and component placement strategies in additive manufacturing workflows, ultimately contributing to safer and more durable AM parts in demanding applications. Acknowledgements The authors acknowledge the support by Czech Science Foundation (grant No. 23-05338S), Grant Agency of the Czech Technical University in Prague within the SGS23/156/OHK2/3T/12 project and 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. The authors would like to gratefully acknowledge the funding provided by the European Union through the AM SURF project (designation: BYCZ01-032, Interreg Czech-Bavarian program). This project was carried out in collaboration with OTH Regensburg, as part of the Cluster KmK initiative focused on construction with plastics, joining technologies, and lightweight construction. References [1] Matušů M, Dimke K, Šimota J, Papuga J, Rosenthal J, Mára V, Beránek L. Energy -based method for analyzing fatigue properties of additively manufactured AlSi10Mg. Journal of Mechanical Science and Technology 2023;37:7. https://doi.org/10.1007/s12206-022-2110 6. [2] Matušů M, Džuberová L, Papuga J, Rosenthal J, Šimota J, Beránek L. Fatigue Analysis and Heat Treatment Comparison of Additive ly Manufactured Specimens from AlSi10Mg Alloy. International Journal of Fatigue 2024;vol. 185:18. https://doi.org/10.1016/j.ijfatigue.2024.108357. [3] Matušů M, Rosenthal J, Papuga J, Šimota J, Džuberová L, Mára V, Beránek L. Fatigue analysis of additively manufactured specim ens from AlSi10Mg with different levels of powder recycling. Procedia Structural Integrity 2024;vol. 54:135-142. https://doi.org/10.1016/j.prostr.2024.01.065. [4] Del Re F, Scherillo F, Contaldi V, Palumbo B, Squillace A, Corrado P, Di Petta P. Mechanical properties characterisation of AlSi10Mg parts produced by laser powder bed fusion additive manufacturing. International Journal of Materials Research 2019;vol. 110:436-446. https://doi.org/10.3139/146.111761. [5] Matušů M, David P, Blaha D, Rosenthal J. AI -Based Fatigue Life Prediction of Additively Manufactured AlSi10Mg Considering Self Heating Effect and Printing Position on the Build Platform [In process]. Pilsen: University of West Bohemia; 2024. [6] Hitzler L, Hirsch J, Merkel M, Hall W, Öchsner A. Position dependent surface quality in selective laser melting. Materialwissenschaft und Werkstofftechnik 2017;vol. 48:327-334. https://doi.org/10.1002/mawe.201600742. [7] Sendino S, Martinez S, Lamikiz A, Lartategui F, Gardon M, Gonzalez J. Analytical study of the melt pool distortion in the Laser Powder Bed Fusion Process caused by the angle of incidence of the laser and its effect on the surface finish of the part. IOP Conference Series: Materials Science and Engineering 2021;vol. 1193. https://doi.org/10.1088/1757-899X/1193/1/012010. [8] Kohout J, Věchet S. A new function for fatigue curves characterization and its multiple merits. International Journal of Fati gue 2001;vol. 23:175-183. https://doi.org/10.1016/S0142-1123(00)00082-7. [9] Matušů M, Šimota J, Papuga J, Rosenthal J, Beránek L, Costa P, Bumba F, Reis L. S – N curves established from limiting energy in the case of specimens additively manufactured from AlSi10Mg. Fatigue & Fracture of Engineering Materials & Structures 2024;vol. 47:4771-4790. https://doi.org/10.1111/ffe.14442. [10] Kotzem D, Arold T, Niendorf T, Walther F. Influence of specimen position on the build platform on the mechanical properties of as-built direct aged electron beam melted Inconel 718 alloy. Materials Science and Engineering: A 2020;vol. 772. https://doi.org/10.1016/j.msea.2019.138785.