PSI - Issue 38

ScienceDirect Structural Integrity Procedia 00 (2021) 000 – 000 Structural Integrity Procedia 00 (2021) 000 – 000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceD rect Available online at www.sciencedirect.com ScienceDirect

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

Procedia Structural Integrity 38 (2022) 77–83

© 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 Fatigue Design 2021 Organizers Abstract In order to find a resource efficient approach for the fatigue lifetime prediction of laser powder bed fusion (L-PBF) processed AlSi10Mg material, results of tensile and fatigue tests were compared. The specimens were manufactured with three different L PBF machines and studied in different heat treatment conditions (as-built, annealed, T6 heat treated). The investigations showed that the high attainable tensile strength properties after the manufacturing process are not beneficial in the high cycle fatigue (HCF) regime. In contrast, the applied heat treatments, which lead typically to a decrease of ultimate tensile strength, improved dramatically the fatigue behavior. Additionally, a clear correlation between the elongation at fracture and HCF resistance has been found for individual heat treatment conditions. This empiric relationship provides an estimation of the fatigue resistance in the presence of material defects and can be implemented in part and process approvals. © 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 Fatigue Design 2021 Organizers Keywords: Additive Manufacturing; Laser powder bed fusion; AlSi10Mg; Tensile properties; Fatigue properties 1. Introduction Qualification of additively manufactured (AM) components and processes is still challenging and requires an understanding of the relationship among technological parameters, microstructure, and resulting mechanical performance. For the perspective use of AM structures as safety-critical components, conventional approval processes need costly and time-consuming test series and are, thus, in contradiction with the high production flexibility achievable with those technologies. It is well known that the mechanical properties of parts produced with L-PBF – FATIGUE DESIGN 2021, 9th Edition of the International Conference on Fatigue Design Correlation between quasistatic und fatigue properties of additively manufactured AlSi10Mg using Laser Powder Bed Fusion Andreas Kempf a *, Julius Kruse b , Mauro Madia b , Kai Hilgenberg b a Volkswagen Aktiengesellschaft, Brieffach 14370, 38436 Wolfsburg, Deutschland b Bundesanstalt für Materialforschung und – prüfung (BAM), Unter den Eichen 87, 12205 Berlin, Deutschland Abstract In order to find a resource efficient approach for the fatigue lifetime prediction of laser powder bed fusion (L-PBF) processed AlSi10Mg material, results o tensile and f tigue tests were compared. The specimens were manufactured with three different L PBF machines and studied in differ nt heat reatm nt conditi ns ( s-built, annealed, T6 heat treated). The investigations showed that the high att inable tensile strength properties after the manufacturing process are not benefici l in the igh cycle fatigue (HCF) regim . In contrast, th applied heat treatm nts, which lead typically t a decrease of ult mate t nsile strength, improved dramatically the f tigue behav or. Additionally, a clear correl tion between the elongation at fracture and HCF resistance has be n found for individual h at treatment conditions. This empi ic relationship provides n estimation of the fatigu resistance in the presence of materi d fec s nd can be implemented in pa t and pr cess ap r als. © 2021 The Authors. Publi he 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 u der re ponsibility of scientific committe of the Fatigue Design 2021 Organ z rs Keywords: Additive Manufacturing; Laser powder bed fusion; AlSi10Mg; Tensile properties; Fatigue properties 1. Introduction Qualification of additively manufactured (AM) components and processes is still challenging and requires an understanding of the relationship mong technological parameters, micro tructure, nd resulti g mechanical performance. F r the pe spective use of AM s ructures as safety-critical co ponents, conve tional approval processes n ed costly and ime-consuming t st serie and are, thus, in contradiction wi h the high production flexibility achievable with thos technologies. It i well k own that the me hanical pr pert es of parts produced with L-PBF – FATIGUE DESIGN 2021, 9th Edition of the International Conference on Fatigue Design Correlation between quasistatic und fatigue properties of additively manufactured AlSi10Mg using Laser Powder Bed Fusion Andreas Kempf a *, Julius Kruse b , Mauro Madia b , Kai Hilgenberg b a Volkswagen Aktiengesellschaft, Brieffach 14370, 38436 Wolfsburg, Deutschland b Bundesanstalt für Materialforschung und – prüfung (BAM), Unter den Eichen 87, 12205 Berlin, Deutschland

* Corresponding author. Tel.: 05361-9-990523. E-mail address: andreas.kempf1@volkswagen.de * Corresponding author. Tel.: 05361-9-990523. E-mail address: andreas.kempf1@volkswagen.de

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 Fatigue Design 2021 Organizers 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 u der responsibility of t scientific committe of the Fatigue Design 2021 Organiz rs

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 Fatigue Design 2021 Organizers 10.1016/j.prostr.2022.03.009