PSI - Issue 77

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2026) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2026) 000 – 000

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Procedia Structural Integrity 77 (2026) 127–134

International Conference on Structural Integrity Influence of build position on the fatigue performance of additively manufactured AlSi10Mg specimens of various heat treatments Martin Matušů 1,2 *, Jan Papuga 1 , David Blaha 1 , Bastian Roidl 2 , Jakub Rosenthal 2, International Conference on Structural Integrity Influence of build position on the fatigue performance of additively manufactured AlSi10Mg specimens of various heat treatments Martin Matušů 1,2 *, Jan Papuga 1 , David Blaha 1 , Bastian Roidl 2 , Jakub Rosenthal 2,

Jan Šimota 1 , Lorenzo Pagliari 3 and Franco Concli 3 1 FME, Czech Technical University in Prague. Technická 4, Praha 6, Czech Republic, 2 Department of Mechanical and Environmental Engineering, OTH Amberg-Weiden, Kaiser- Wilhelm-Ring 23, Amberg 92224, Germany 3 Faculty of Engineering, Free University of Bolzano/Bozen, 39100 Bolzano, Italy * corresponding author: martin.matusu@fs.cvut.cz Jan Šimota 1 , Lorenzo Pagliari 3 and Franco Concli 3 1 FME, Czech Technical University in Prague. Technická 4, Praha 6, Czech Republic, 2 Department of Mechanical and Environmental Engineering, OTH Amberg-Weiden, Kaiser- Wilhelm-Ring 23, Amberg 92224, Germany 3 Faculty of Engineering, Free University of Bolzano/Bozen, 39100 Bolzano, Italy * corresponding author: martin.matusu@fs.cvut.cz

© 2026 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 responsibility of ICSI organizers In addition, four different heat treatment conditions were evaluated to understand their impact on fatigue resistance. Special emphasis was placed on the manufacturer-recommended thermal treatment for AlSi10Mg, providing a comprehensive perspective on the interplay between printing position, thermal processing, and fatigue performance. These findings offer critical insights for optimizing additive manufacturing strategies in demanding structural applications. © 2026 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 responsibility of ICSI organizers Keywords: additive manufacturing, fatigue strength, high cycle fatigue, AlSi10Mg Abstract This study explores the fatigue behavior of additively manufactured AlSi10Mg components under cyclic loading, with a specific focus on the influence of specimen position on the build platform (BP) on its fatigue life. Utilizing the well-established Laser Powder Bed Fusion (L-PBF) process specifically the Concept Laser M2 system experimental data collected over the past four years, including distinct S-N curves, have been used to identify regions of reduced fatigue performance across the build platform. To systematically investigate this spatial variation, each built platform was analyzed individually, with particular attention paid to unpredictable specimens and their precise locations on the print bed. A dedicated experimental platform of fatigue specimens was prepared, comprising 44 specimens divided into two groups of applied load levels. This setup enabled the first quantitative assessment of the correlation between spatial build position and fatigue strength in L-PBF-fabricated AlSi10Mg. In addition, four different heat treatment conditions were evaluated to understand their impact on fatigue resistance. Special emphasis was placed on the manufacturer-recommended thermal treatment for AlSi10Mg, providing a comprehensive perspective on the interplay between printing position, thermal processing, and fatigue performance. These findings offer critical insights for optimizing additive manufacturing strategies in demanding structural applications. © 2026 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 responsibility of ICSI organizers Keywords: additive manufacturing, fatigue strength, high cycle fatigue, AlSi10Mg Abstract This study explores the fatigue behavior of additively manufactured AlSi10Mg components under cyclic loading, with a specific focus on the influence of specimen position on the build platform (BP) on its fatigue life. Utilizing the well-established Laser Powder Bed Fusion (L-PBF) process — specifically the Concept Laser M2 system — experimental data collected over the past four years, including distinct S-N curves, have been used to identify regions of reduced fatigue performance across the build platform. To systematically investigate this spatial variation, each built platform was analyzed individually, with particular attention paid to unpredictable specimens and their precise locations on the print bed. A dedicated experimental platform of fatigue specimens was prepared, comprising 44 specimens divided into two groups of applied load levels. This setup enabled the first quantitative assessment of the correlation between spatial build position and fatigue strength in L-PBF-fabricated AlSi10Mg.

* Corresponding author. Tel.: +420-22435-2519 E-mail address: martin.matusu@fs.cvut.cz * Corresponding author. Tel.: +420-22435-2519 E-mail address: martin.matusu@fs.cvut.cz

2452-3216 © 2026 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 responsibility of ICSI organizers 2452-3216 © 2026 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 responsibility of ICSI organizers

2452-3216 © 2026 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 responsibility of ICSI organizers 10.1016/j.prostr.2026.01.018