PSI - Issue 82

Katarina Monkova et al. / Procedia Structural Integrity 82 (2026) 107–111 Katarina Monkova et al. / Structural Integrity Procedia 00 (2021) 000–000

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In order to understand the failure mechanism under uniaxial tension, the fracture surfaces of tensile standard dog-bone specimens were examined using a JEOL IT-800 HL Scanning Electron Microscope (SEM), under 20 kV accelerating voltage coupled with an EDAX, Octane Elect EDS silicon drift detector (SDD) with detecting surface of sensor 60 mm 2 , for Energy Dispersive Spectrometry (EDS). Fractographic analysis revealed a mainly quasi-ductile failure mechanism, characterized by fine dimples and tear ridges (Monkova et al, 2025) on the fracture surfaces. Indicative SEM micrograph is presented in Fig. 4.

Fig. 4. SEM fractograph of a typical fracture surface of SLM AlSi10Mg tensile sample..

4. Conclusions The application of porous materials to real-world components has great potential. However, understanding the properties of structures is a major challenge for preventing failure of these components, as they are often used in applications with a low safety factor (such as aircraft), where their lightweight material properties can be fully utilized. However, the safety and reliability of such devices must come first. The research was focused on the compression properties of the complex Neovius structure made of aluminium alloy using SLM technology. The results showed that increasing the volume fraction causes not only an increase in the maximum compressive load at the first peak, but also the compressive stiffness of the structure, which increases linearly with increasing volume fraction and reaches stiffness values of 151.2 kN/mm at volume fraction of 40 %. The analysis of the fracture surface indicated a predominantly quasi-ductile failure mechanism, characterized by fine dimples. Acknowledgements The article was prepared with direct support of Ministry of Education, Science, Research and Sport of Slovak Republic through the grants APVV-19-0550, APVV SK-AT-23-0008, and KEGA 042TUKE-4/2025. References ASTM E9:2019. Standard Test Methods of Compression Testing of Metallic Materials at Room Temperature, ASTM International, United States. Boursier Niutta, C., Paolino, D.S., Tridello, A., 2023. Additively manufactured lattice structures: An innovative defect-based design methodology against crash impact, Engineering Failure Analysis 152, 107436, https://doi.org/10.1016/j.engfailanal.2023.107436. Data sheet Aluminium AlSi10Mg, MT 3D Ltd., www.metaltechnics3d.com. Fernandes, R.F., et al., 2024. Failure analysis of fatigue crack propagation in specimens of AlSi10Mg aluminum alloy produced by L-PBF: Effect of different heat treatments, Engineering Failure Analysis163, 108595, https://doi.org/10.1016/j.engfailanal.2024.108595 Khosravani, M. R., Reinicke, T., 2021. Fracture behavior of intact and defected 3D-printed parts, Procedia Structural Integrity 31, 105-110. Abueidda, D.W., et al., 2020. Compression and buckling of microarchitectured Neovius-lattice, Extreme Mechanics Letters 37, 100688, https://doi.org/10.1016/j.eml. 2020.100688.