PSI - Issue 53

ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000 Structural Integrity Procedia 00 (2022) 000 – 000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Available online at www.sciencedirect.com ScienceDirect

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

Procedia Structural Integrity 53 (2024) 172–177

© 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 The performance of this material under cyclic loading can be influenced by many factors such as porosities, residual stresses, corrosive environments, building direction, etc. This research aimed at assessing the fatigue crack propagation behavior of TiAl64V specimens made by EBM along different building directions. Tests were carried out using standard 8 mm thick Compact-Tension C(T) specimens in laboratory conditions. The main objective was to study the effects of the building direction on the residual fatigue life of specimens and to understand the fatigue failure mechanisms. © 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 Keywords: Building direction; Fatigue crack growth; EBM 1. Introduction Among the many technologies for Additive Manufacturing (AM) of metals and polymers (Citarella et al., 2021), powder bed fusion technologies such as Electron Beam Melting (EBM) and Selective Laser Melting (SLM) are those Abstract Electron Beam Melting (EBM) is a technology that allows to process materials, such as titanium alloys, that require high process temperatures and are difficult-to-machine through traditional manufacturing technologies. The Ti6Al4V alloy, widely used in biomedical, automotive and aerospace applications, relies in the group of the materials that present these requirements and, nowadays, is perhaps the most widely EBM-printed material. The performance of this material under cyclic loading can be influenced by many factors such as porosities, residual stresses, corrosive environments, building direction, etc. This research aimed at assessing the fatigue crack propagation behavior of TiAl64V specimens made by EBM along different building directions. Tests were carried out using standard 8 mm thick Compact-Tension C(T) specimens in laboratory conditions. The main objective was to study the effects of the building direction on the residual fatigue life of specimens and to understand the fatigue failure mechanisms. © 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 Keywords: Building direction; Fatigue crack growth; EBM 1. Introduction Among the many technologies for Additive Manufacturing (AM) of metals and polymers (Citarella et al., 2021), powder bed fusion technologies such as Electron Beam Melting (EBM) and Selective Laser Melting (SLM) are those Third European Conference on the Structural Integrity of Additively Manufactures Materials (ESIAM23) Influence of building direction on the fatigue crack-growth of Ti6Al4V specimens made by EBM Venanzio Giannella a,* , Stefania Franchitti b , Rosario Borrelli b , Raffaele Sepe a a Department of Industrial Engineering, University of Salerno, Fisciano (SA), Italy b Italian Aerospace Research Centre, Structural and Material Department, CIRA, Capua (CE), Italy Abstract Electron Beam Melting (EBM) is a technology that allows to process materials, such as titanium alloys, that require high process temperatures and are difficult-to-machine through traditional manufacturing technologies. The Ti6Al4V alloy, widely used in biomedical, automotive and aerospace applications, relies in the group of the materials that present these requirements and, nowadays, is perhaps the most widely EBM-printed material. Third European Conference on the Structural Integrity of Additively Manufactures Materials (ESIAM23) Influence of building direction on the fatigue crack-growth of Ti6Al4V specimens made by EBM Venanzio Giannella a,* , Stefania Franchitti b , Rosario Borrelli b , Raffaele Sepe a a Department of Industrial Engineering, University of Salerno, Fisciano (SA), Italy b Italian Aerospace Research Centre, Structural and Material Department, CIRA, Capua (CE), Italy

* Corresponding author. Tel.: +39-089-964082. E-mail address: vgiannella@unisa.it * Corresponding author. Tel.: +39-089-964082. E-mail address: vgiannella@unisa.it

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 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

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.2024.01.021