PSI - Issue 53

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ScienceDirect

Procedia Structural Integrity 53 (2024) 327–337 Structural Integrity Procedia 00 (2023) 000–000 Structural Integrity Procedia 00 (2023) 000–000

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

© 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 responsibility of the scientific committee of the ESIAM23 chairpersons Abstract Porous materials with heterogeneous pore features are used in many branches of technology, from lightweight structures to biomed ical implants and electrodes. These materials derive their properties from their internal architecture, which is often poorly controlled via conventional manufacturing routes (e.g. foaming, templating). Here, we combine laser powder bed fusion (LPBF) additive man ufacturing technology with computer design to fabricate metallic cellular architectures with heterogeneous, yet precisely controlled, pore features. The materials of this study contain through thickness pores - with arbitrary micrometric size and shape - randomly dispersed into a dense metallic matrix. Their porous architecture is generated numerically using a random sequential absorption algorithm, and is 3D-printed out of two metallic powders. Using image analysis, we statistically quantify the influence of the LPBF process parameters on the 3D-printed pore geometry (i.e. morphology and size), and develop image-based finite-element models to measure numerically the resulting homogenized elastic mechanical properties. Collectively, our results help elucidate the role of geometric (i.e. topological) defects induced by the LPBF process on the structural performance of metallic cellular materials with random pore features. © 2023 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 responsibility of the scientific committee of the ESIAM23 chairpersons. Keywords: Metallic cellular materials; ; Laser Powder Bed Fusion (LPBF) ; Random Porous Media ; Finite-Element Simulations; Homogenization; Mechanical Properties. Abstract Porous materials with heterogeneous pore features are used in many branches of technology, from lightweight structures to biomed ical implants and electrodes. These materials derive their properties from their internal architecture, which is often poorly controlled via conventional manufacturing routes (e.g. foaming, templating). Here, we combine laser powder bed fusion (LPBF) additive man ufacturing technology with computer design to fabricate metallic cellular architectures with heterogeneous, yet precisely controlled, pore features. The materials of this study contain through thickness pores - with arbitrary micrometric size and shape - randomly dispersed into a dense metallic matrix. Their porous architecture is generated numerically using a random sequential absorption algorithm, and is 3D-printed out of two metallic powders. Using image analysis, we statistically quantify the influence of the LPBF process parameters on the 3D-printed pore geometry (i.e. morphology and size), and develop image-based finite-element models to measure numerically the resulting homogenized elastic mechanical properties. Collectively, our results help elucidate the role of geometric (i.e. topological) defects induced by the LPBF process on the structural performance of metallic cellular materials with random pore features. © 2023 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 responsibility of the scientific committee of the ESIAM23 chairpersons. Keywords: Metallic cellular materials; ; Laser Powder Bed Fusion (LPBF) ; Random Porous Media ; Finite-Element Simulations; Homogenization; Mechanical Properties. Third European Conference on the Structural Integrity of Additively Manufactures Materials (ESIAM23) Architected metallic cellular materials with random pore features: computer design, LPBF fabrication and mechanical properties S. Leonardi a , C. Dupuy b , P. Peyre b , A-L. Helbert a , M.G. Tarantino c, ∗ a Universite´ Paris-Saclay, CNRS, ICMMO - Institut de chimie mole´culaire et des mate´riaux d’Orsay, 91405, Orsay, France b Laboratoire PIMM, Arts et Metiers Institute of Technology, CNRS, Cnam, HESAM University, 151 boulevard de l’Hopital, 75013 Paris, France c Universite´ Paris-Saclay, CentraleSupe´lec, ENS Paris-Saclay, CNRS, LMPS - Laboratoire de Me´canique Paris-Saclay, 91190, Gif-sur-Yvette, France. Third European Conference on the Structural Integrity of Additively Manufactures Materials (ESIAM23) Architected metallic cellular materials with random pore features: computer design, LPBF fabrication and mechanical properties S. Leonardi a , C. Dupuy b , P. Peyre b , A-L. Helbert a , M.G. Tarantino c, ∗ a Universite´ Paris-Saclay, CNRS, ICMMO - Institut de chimie mole´culaire et des mate´riaux d’Orsay, 91405, Orsay, France b Laboratoire PIMM, Arts et Metiers Institute of Technology, CNRS, Cnam, HESAM University, 151 boulevard de l’Hopital, 75013 Paris, France c Universite´ Paris-Saclay, CentraleSupe´lec, ENS Paris-Saclay, CNRS, LMPS - Laboratoire de Me´canique Paris-Saclay, 91190, Gif-sur-Yvette, France.

1. Introduction 1. Introduction

Nowadays, the use of lightweight metallic materials has become of crucial importance in many industrial appli cations, extending from the transport to the renewable energy sector. Doing more with less is the primary purpose of structural lightweigthing and is key for improving the sustainability of engineering materials and products. Over Nowadays, the use of lightweight metallic materials has become of crucial importance in many industrial appli cations, extending from the transport to the renewable energy sector. Doing more with less is the primary purpose of structural lightweigthing and is key for improving the sustainability of engineering materials and products. Over

∗ Corresponding author E-mail address: gabriella.tarantino@universite-paris-saclay.fr ∗ Corresponding author E-mail address: gabriella.tarantino@universite-paris-saclay.fr

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 responsibility of the scientific committee of the ESIAM23 chairpersons 10.1016/j.prostr.2024.01.040 2210-7843 © 2023 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 responsibility of the scientific committee of the ESIAM23 chairpersons. 2210-7843 © 2023 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 responsibility of the scientific committee of the ESIAM23 chairpersons.