PSI - Issue 38

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

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 38 (2022) 94–108

FATIGUE DESIGN 2021, 9th Edition of the International Conference on Fatigue Design Static and fatigue behavior of hydraulic components produced by different additive manufacturing processes Christophe Grosjean a , Michel Marzin b , Etienne Camus b , Maxime Robert a , Thomas Munch c *

a CETIM, Centre Technique des Industries Mécaniques, 7 rue de la presse, 42000 St Etienne, France b CETIM, Centre Technique des Industries Mécaniques, 2 Avenue Félix Louat, 60300 Senlis, France c Liebherr-France SAS, 2 avenue Joseph Rey, 68005 Colmar, France

Abstract

© 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 This study focuses on hydraulic components’ behavior to significant pressure loads both in static and fatigue conditions. This hydraulic block commonly used on large machines (earthmo ving, mining, agriculture…) was initially designed to be machined but has been topologically optimized for additive manufacturing methods: laser powder bed fusion (L-PBF), metal binder jetting (MBJ) and lost-wax casting. The material chosen was a martensitic precipitation-hardening stainless steel that provides good corrosion resistance and high mechanical properties. Most of the samples were obtained with laser powder bed fusion and underwent static and fatigue pressure tests, exceeding the technical specifications of the end user. The tested samples have then been screened and went through various fatigue finite element analyses. This approach demonstrated that all the critical fatigue failure locations obtained experimentally were predictable through software simulation, local non uniform roughness and residual stress in failure areas being key factors for good correlation. © 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, fatigue, laser-powder bed fusion, 17-4PH, hydraulic components, computing and testing correlations

* Corresponding author. Tel.: +33 7 89 04 28 78. E-mail address: christophe.grosjean@cetim.fr

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 under responsibility of the scientific committee of the Fatigue Design 2021 Organizers 10.1016/j.prostr.2022.03.011