PSI - Issue 66

Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2025) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2025) 000–000 Available online at www.sciencedirect.com ScienceDirect

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Procedia Structural Integrity 66 (2024) 426–432

8th International Conference on Crack Paths Analysis of the specifics in fatigue properties of additively manufactured metallic materials Vladimír Chmelko a *, Matúš Margetin a , Miroslava Ku č erková a , Miloslav Kepka b a Slovak University of Technology, Institude of applied mechanics and mechatronics, Námestie slobody 17, 81231 Bratislava, Slovakia b University of West Bohemia, Faculty of Mechanical Engineering, Regional Technological Institute, Univer-zitni 22, 306 14 Pilsen Abstract In addition to freedom of shape, the additive manufacturing of materials and components also introduces new parameters that affect fatigue properties. These are in particular: Anisotropy of mechanical properties as a consequence of the direction of addition of layers Internal and surface defects Surface roughness as a consequence of bailling Different slope of S-N curves for normal and shear stresses. In this paper, these specifics are analyzed and documented in more detail based on the cyclic tension-compression and alternating torsion tests performed on selected additively manufactured materials. © 2025 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 CP 2024 Organizers 8th International Conference on Crack Paths Analysis of the specifics in fatigue properties of additively manufactured metallic materials Vladimír Chmelko a *, Matúš Margetin a , Miroslava Ku č erková a , Miloslav Kepka b a Slovak University of Technology, Institude of applied mechanics and mechatronics, Námestie slobody 17, 81231 Bratislava, Slovakia b University of West Bohemia, Faculty of Mechanical Engineering, Regional Technological Institute, Univer-zitni 22, 306 14 Pilsen Abstract In addition to freedom of shape, the additive manufacturing of materials and components also introduces new parameters that affect fatigue properties. These are in particular: Anisotropy of mechanical properties as a consequence of the direction of addition of layers Internal and surface defects Surface roughness as a consequence of bailling Different slope of S-N curves for normal and shear stresses. In this paper, these specifics are analyzed and documented in more detail based on the cyclic tension-compression and alternating torsion tests performed on selected additively manufactured materials. © 2025 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 CP 2024 Organizers © 2025 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 CP 2024 Organizers 1. Introduction For more than 160 years there has been systematic research into the behaviour of materials under cyclic loading. During this relatively long period of time, many experimental results have been collected which have helped to identify a phenomenon that has been named material fatigue. Among the milestones it is certainly worth mentioning 1. Introduction For more than 160 years there has been systematic research into the behaviour of materials under cyclic loading. During this relatively long period of time, many experimental results have been collected which have helped to identify a phenomenon that has been named material fatigue. Among the milestones it is certainly worth mentioning Keywords: additivelly manufactured metals; fatigue properties; defects; anisotropy; Keywords: additivelly manufactured metals; fatigue properties; defects; anisotropy;

* Corresponding author. Tel.: +421 2 57296225; E-mail address: vladimir.chmelko@stuba.sk * Corresponding author. Tel.: +421 2 57296225; E-mail address: vladimir.chmelko@stuba.sk

2452-3216 © 2025 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 CP 2024 Organizers 2452-3216 © 2025 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 CP 2024 Organizers

2452-3216 © 2025 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 CP 2024 Organizers 10.1016/j.prostr.2024.11.095