PSI - Issue 68

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

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 68 (2025) 596–602

European Conference on Fracture 2024 Effect of temperature on tensile and fatigue properties of AlSi10Mg lattice structures fabricated by additive manufacturing Shiyu Suzuki a *, Natsuki Tsushima a,b a Japan Aerospace Exploration Agency (JAXA), 6-13-1 Osawa, Mitaka-shi, Tokyo 181-0015, Japan b The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8654, Japan Abstract This study investigated the effect of temperature on tensile and fatigue properties of AlSi10Mg lattice structures fabricated by the laser powder bed fusion. Static tensile tests of lattice specimens were performed at -60 °C, room temperature (RT) and 200 °C, and fatigue tests using the lattice and cylindrical specimens were performed at RT and 200 °C. In the static tensile tests of the lattice specimens, decreasing temperature from RT to -60 °C resulted in a higher strength and an equivalent ductility whereas increasing temperature from RT to 200 °C resulted in a lower strength and a higher ductility. In the fatigue tests of the lattice specimens at RT, macroscopically, the elastic deformation was dominant under all load conditions, and Basquin’s law was able to be successfully applied. The fatigue life of the lattice specimens was less than one-tenth of that of the cylindrical specimens, which was attributed to stress concentrations in the lattice structures due to their geometries. In the fatigue tests at 200 °C, the fatigue behavior under low stress conditions of σ a ≤ 40.9 MPa was considered the high cycle fatigue, whereas the fatigue behavior under the highest stress conditions of σ a = 50.8 MPa was considered the low cycle fatigue. In the high cycle fatigue regime, the fatigue life at 200 °C was longer than that at RT, which may be unique to the lattice structure employed in this study. © 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 ECF24 organizers Keywords: Additive Manufacturing; Lattice Structure; AlSi10Mg; Tensile and fatigue properties; Temperature European Conference on Fracture 2024 Effect of temperature on tensile and fatigue properties of AlSi10Mg lattice structures fabricated by additive manufacturing Shiyu Suzuki a *, Natsuki Tsushima a,b a Japan Aerospace Exploration Agency (JAXA), 6-13-1 Osawa, Mitaka-shi, Tokyo 181-0015, Japan b The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8654, Japan Abstract This study investigated the effect of temperature on tensile and fatigue properties of AlSi10Mg lattice structures fabricated by the laser powder bed fusion. Static tensile tests of lattice specimens were performed at -60 °C, room temperature (RT) and 200 °C, and fatigue tests using the lattice and cylindrical specimens were performed at RT and 200 °C. In the static tensile tests of the lattice specimens, decreasing temperature from RT to -60 °C resulted in a higher strength and an equivalent ductility whereas increasing temperature from RT to 200 °C resulted in a lower strength and a higher ductility. In the fatigue tests of the lattice specimens at RT, macroscopically, the elastic deformation was dominant under all load conditions, and Basquin’s law was able to be successfully applied. The fatigue life of the lattice specimens was less than one-tenth of that of the cylindrical specimens, which was attributed to stress concentrations in the lattice structures due to their geometries. In the fatigue tests at 200 °C, the fatigue behavior under low stress conditions of σ a ≤ 40.9 MPa was considered the high cycle fatigue, whereas the fatigue behavior under the highest stress conditions of σ a = 50.8 MPa was considered the low cycle fatigue. In the high cycle fatigue regime, the fatigue life at 200 °C was longer than that at RT, which may be unique to the lattice structure employed in this study. © 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 ECF24 organizers Keywords: Additive Manufacturing; Lattice Structure; AlSi10Mg; Tensile and fatigue properties; Temperature © 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 ECF24 organizers

* Corresponding author. E-mail address: suzuki.shiyuu@jaxa.jp * Corresponding author. E-mail address: suzuki.shiyuu@jaxa.jp

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 ECF24 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 ECF24 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 ECF24 organizers 10.1016/j.prostr.2025.06.103