PSI - Issue 43

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000

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ScienceDirect

Procedia Structural Integrity 43 (2023) 184–189

© 2023 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 the responsibility of MSMF10 organizers. © 20 23 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under the responsibility of MSMF10 organizers. This c ntribution examines the Al2024-RAM2 alloy recently qualified for industrial production by he ervice company BEAM IT (Fornovo Taro, Italy). The powder was processed in a SLM 280 HL Twin system (SLM Solutio s GmbH, DE) to fabricate specime s for fatigue esting which th n u derw nt a solution plus-aging heat treatment (T6). Specimens oriented in three different directions with respect to th build direction wer left in the as-built surface state and used for the characterization of microstructure and surface quality. Fatigue da a obtained nder high cycle fatigue loading conditions are presented and discussed in terms of directional effect and surface integrity (as-built vs. polished surfaces). © 20 23 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under the responsibility of MSMF10 organizers. 10th International Conference on Materials Structure and Micromechanics of Fracture Microstructure and Fatigue Properties of Al2024-RAM2 Aluminum Alloy Obtained by Laser Powder Bed Fusion Tibor Varmus 1 , Radomila Konecna 1* , Gianni Nicoletto 2 and Federico Uriati 2 1 University of Zilina, Univerzitna 8215/1,01026 Zilina, Slovakia 2 University of Parma, Parco Area delle Science 181/A, 43124 Parma, Italy Abstract The wrought 2024 aluminum alloy is an established aluminum alloy with copper as the primary alloying element. Due to its high strength and fatigue resistance, it is widely used for aircraft primary structures. Development of the AM counterpart of this high strength alloy starting from gas atomized powder has been challenged by its tendency to hot tearing during solidification thus compromising mechanical properties. Recently, the innovation by Elementum 3D made the 2024 alloy compatible with the Laser Powder Bed Fusion technology (L-PBF). The key is a patented production process of reactive additive manufacturing (RAM), which utilizes exothermic chemical reactions to synthesize product materials during the additive process to improve printability while achieving mechanical properties comparable to those of a conventionally produced alloy. This contribution examines the Al2024-RAM2 alloy recently qualified for industrial production by the service company BEAM IT (Fornovo Taro, Italy). The powder was processed in a SLM 280 HL Twin system (SLM Solutions GmbH, DE) to fabricate specimens for fatigue testing which then underwent a solution-plus-aging heat treatment (T6). Specimens oriented in three different directions with respect to the build direction were left in the as-built surface state and used for the characterization of microstructure and surface quality. Fatigue data obtained under high cycle fatigue loading conditions are presented and discussed in terms of directional effect and surface integrity (as-built vs. polished surfaces). 10th International Conference on Materials Structure and Micromechanics of Fracture Microstructure and Fatigue Properties of Al2024-RAM2 Aluminum Alloy Obtained by Laser Powder Bed Fusion Tibor Varmus 1 , Radomila Konecna 1* , Gianni Nicoletto 2 and Federico Uriati 2 1 University of Zilin , Univ rzitna 8215/1,0 026 Zilina, Slovaki 2 University of Parma, Parco Area delle Science 181/A, 43124 Parma, Italy Abstract Th wrought 2024 aluminum alloy is an established luminum allo with copper as the primary alloying element. Due to ts high nd fatigue resistance, it is w d ly use for ircraft primary structure . Dev lopment of the AM counterpart of this high strength alloy starting from gas atomiz d powder has been challenged by its tendency to hot te ring during solidification thus c mpromising mechanical properties. Recently, the innov ion by Elementum 3D made the 2024 alloy co patible with the Laser Powder Bed Fusi n technology (L-PBF). The ke is a patente production process of reactive additive manufacturing (RAM), ch utilizes exotherm chemical reactions to synthesiz product materi ls du ing the dditive process to improve printability w ile achieving mechanical properties comparab e to those of a conventionally produce all y.

Keywords: Al2024-RAM2; L-PBF; fatigue life; mini specimen; microstructure; Keywords: Al2024-RAM2; L-PBF; fatigue life; mini specimen; microstructure;

* Corresponding author. Tel.: +421 41 513 2604 E-mail address: radomila.konecna@fstroj.uniza.sk * Correspon ing auth r. Tel.: +421 41 513 2604 E-mail address: radomila.konecna@fstroj.uniza.sk

2452-3216 © 2023 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 the responsibility of MSMF10 organizers. 2452-3216 © 2023 The Authors. Published by Elsevier B.V. This is an ope access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under the responsibility of MSMF10 organizers.

2452-3216 © 2023 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 the responsibility of MSMF10 organizers. 10.1016/j.prostr.2022.12.256