PSI - Issue 28

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000–000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 28 (2020) 11–18

© 2020 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 European Structural Integrity Society (ESIS) ExCo Abstract Electron beam powder bed fusion (E-PBF) enables the fabrication of new and complex light-weight structures within short process times. However, increasing complexity of the producible components leads to complex damage mechanisms and interactions which can not sufficiently be represented by typical material properties such as ultimate tensile strength or fatigue strength. In the current research, the damage tolerance was investigated within a single unit cell plane for a stretch-dominated lattice type under uniaxial cyclic loading based on the E-PBF manufactured Ti6Al4V alloy. During the experiments, a combination of application-specific optical measurement techniques such as digital image correlation and thermography were used to capture occurring material responses. In particular, a clear relationship between local deformation and temperature increase is visible. In comparison to conventionally manufactured material, similar mechanical properties can be achieved in low cycle fatigue range. Furthermore, captured material responses could be used as a basis for future monitoring systems in order to enable a reliable application in safety relevant components. The Authors. Published by ELSE IER B.V. i an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) r-review under responsibility of the European Structural Integrity Society (ESIS) ExCo Keywords: Electron beam powder bed fusion (E-PBF); fatigue properties, lattice structures; digital image correlation 1. Introduction Additive manufacturing (AM) is known as layer-by-layer manufacturing of components with almost unlimited geometrical freedom (Herzog et al., 2016). So far, especially powder bed fusion (PBF) techniques are part of much 1st Virtual European Conference on Fracture Damage tolerance evaluation of a unit cell plane based on electron beam powder bed fusion (E-PBF) manufactured Ti6Al4V alloy Daniel Kotzem*, Hendrik Ohlmeyer, Frank Walther TU Dortmund University, Department of Materials Test Engineering (WPT), Baroper Str. 303, D-44227 Dortmund, Germany

* Corresponding author. Tel.: +49 231 755 8521; fax: +49 231 755 8029. E-mail address: daniel.kotzem@tu-dortmund.de

2452-3216 © 2020 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 European Structural Integrity Society (ESIS) ExCo

2452-3216 © 2020 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 European Structural Integrity Society (ESIS) ExCo 10.1016/j.prostr.2020.10.003