PSI - Issue 34

Available online at www.sciencedirect.com Available online at www.sciencedirect.com Available online at www.sciencedirect.com

ScienceDirect

Procedia Structural Integrity 34 (2021) 45–50 Structural Integrity Procedia 00 (2019) 000–000 Structural Integrity Procedia 00 (2019) 000–000

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

© 2021 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 Esiam organisers Abstract Metallic additive manufacturing has been developed as a manufacturing process for complex functional parts that may be po tentially applied in various engineering fields, with very distinct mechanical performance requisites. Therefore, it is of primary importance to characterize additive manufacturing materials under various loading conditions in other to understand possible dis tinctive behaviours as regards the conventional material counterparts. This paper aims at characterizing the mechanical behaviour of a very common material for additive manufacturing applications – the 18Ni300 maraging steel. A set of physical and mechan ical tests were performed on conventional and additive maraging steel. Regarding the physical properties, the heat capacity and conductivity were measured with temperature; regarding mechanical characterization, compression tests were performed at various (high) strain rates. Also, tensile tests were performed covering distinct stress triaxialities. Finally, multiaxial tests were performed to evaluate the quasi-static mechanical response of the materials under combined tension / compression and shear loadings with the assistance of Digital Image Correlation. Inverse numerical analyses were performed to evaluate the best constitutive modelling strategies for the materials. Tests revealed the very complex behaviour of the maraging steels and the additive material showed higher strength than the conventional material. 2020 The Authors. Published by Elsevier B.V. i is an open access article under the CC BY- C-ND license (http: // cr ativec mmons.org / licenses / by-nc-nd / 4.0 / ) r-review unde responsibility of the scientific committee of the Esi m organisers. Keywords: Additive manufacturing; maraging steel; materials characterisation; numerical simulation Abstract Metallic additive manufacturing has been developed as a manufacturing process for complex functional parts that may be po tentially applied in various engineering fields, with very distinct mechanical performance requisites. Therefore, it is of primary importance to characterize additive manufacturing materials under various loading conditions in other to understand possible dis tinctive behaviours as regards the conventional material counterparts. This paper aims at characterizing the mechanical behaviour of a very common material for additive manufacturing applications – the 18Ni300 maraging steel. A set of physical and mechan ical tests were performed on conventional and additive maraging steel. Regarding the physical properties, the heat capacity and conductivity were measured with temperature; regarding mechanical characterization, compression tests were performed at various (high) strain rates. Also, tensile tests were performed covering distinct stress triaxialities. Finally, multiaxial tests were performed to evaluate the quasi-static mechanical response of the materials under combined tension / compression and shear loadings with the assistance of Digital Image Correlation. Inverse numerical analyses were performed to evaluate the best constitutive modelling strategies for the materials. Tests revealed the very complex behaviour of the maraging steels and the additive material showed higher strength than the conventional material. © 2020 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 Esiam organisers. Keywords: Additive manufacturing; maraging steel; materials characterisation; numerical simulation The second European Conference on the Structural Integrity of Additively Manufactured Materials Mechanical Behaviour of Maraging Steel Produced by SLM T. Silva a, ∗ , F. Silva a , J. Xavier b , A. Grego´rio c , A. Reis c , P. Rosa c , P. Konop´ık d , M. Rund d , A. Jesus a a INEGI, Institute of Science and Innovation in Mechanical and Industrial Engineering, Rua Dr. Roberto Frias, 4200-465 Porto, PT b UNIDEMI, Research & Development Unit for Mechanical and Industrial Engineering, NOVA University of Lisbon, 2829-516 Caparica, PT c IDMEC, Mechanical Engineering Institute, Instituto Superior Te´cnico, Av. Rovisco Pais 1, 1049-001, Lisboa, PT d COMTES FHT a.s., Pru˚myslova´ 995, Dobrˇany, 334 41, CZ The second European Conference on the Structural Integrity of Additively Manufactured Materials echanical Behaviour of araging Steel Produced by SL T. Silva a, ∗ , F. Silva a , J. Xavier b , A. Grego´rio c , A. Reis c , P. Rosa c , P. Konop´ık d , M. Rund d , A. Jesus a a INEGI, Institute of Science and Innovation in Mechanical and Industrial Engineering, Rua Dr. Roberto Frias, 4200-465 Porto, PT b UNIDEMI, Research & Development Unit for Mechanical and Industrial Engineering, NOVA University of Lisbon, 2829-516 Caparica, PT c IDMEC, Mechanical Engineering Institute, Instituto Superior Te´cnico, Av. Rovisco Pais 1, 1049-001, Lisboa, PT d COMTES FHT a.s., Pru˚myslova´ 995, Dobrˇany, 334 41, CZ

1. Introduction 1. Introduction

The impact of metallic additive manufacturing (MAM) has been notoriously increasing over the last decade (Camp bell et al., 2018). This can be seen as an outcome of the technological development of MAM as an established manu facturing process, capable of producing parts with adequate mechanical properties for structural applications (Kumar The impact of metallic additive manufacturing (MAM) has been notoriously increasing over the last decade (Camp bell et al., 2018). This can be seen as an outcome of the technological development of MAM as an established manu facturing process, capable of producing parts with adequate mechanical properties for structural applications (Kumar

∗ Corresponding author. Tel.: + 0-000-000-0000 ; fax: + 0-000-000-0000. E-mail address: author@institute.xxx ∗ Corresponding author. Tel.: + 0-000-000-0000 ; fax: + 0-000-000-0000. E-mail address: author@institute.xxx

2452-3216 © 2021 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 Esiam organisers 10.1016/j.prostr.2021.12.007 2210-7843 © 2020 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 u der re ponsibility of the scientific committe of the E iam organisers. 2210-7843 © 2020 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 Esiam organisers.