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) 185–189

© 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 Abstract Additive Manufacturing (AM) technologies potentially offer numerous advantages, first and foremost the reduction of the lead time of new products and the possibility of producing any kind of complex shape. Selective laser melting (SLM) processes are the most popular processes for AM of metals; currently, several types of stainless steel have been widely processed via SLM as steel provides a broad range of desirable properties like good ductility, high strength, low cost, and recyclability. Therefore, it is largely used in both industrial and domestic products. However, many factors, such as crack orientation, porosities, residual stresses, heat treatments, corrosion, etc., can degrade the performances of SLM materials significantly, if compared to those of the wrought ones. Therefore, in this work the fatigue crack propagation behaviors of wrought and AM 17-4 PH stainless steel were measured experimentally by considering different crack orientations. Tests were carried out using standard compact-tension C(T) specimens tested at R = 0.1 at a frequency of 5 Hz. The main objective was to study the effect of the crack orientation on crack-length vs. number of cycles curves. © 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: Fatigue; Crack-growth; 17-4 PH; additive manufacturing; specimens Abstract Additive Manufacturing (AM) technologies potentially offer numerous advantages, first and foremost the reduction of the lead time of new products and the possibility of producing any kind of complex shape. Selective laser melting (SLM) processes are the most popular processes for AM of metals; currently, several types of stainless steel have been widely processed via SLM as steel provides a broad range of desirable properties like good ductility, high strength, low cost, and recyclability. Therefore, it is largely used in both industrial and domestic products. However, many factors, such as crack orientation, porosities, residual stresses, heat treatments, corrosion, etc., can degrade the performances of SLM materials significantly, if compared to those of the wrought ones. Therefore, in this work the fatigue crack propagation behaviors of wrought and AM 17-4 PH stainless steel were measured experimentally by considering different crack orientations. Tests were carried out using standard compact-tension C(T) specimens tested at R = 0.1 at a frequency of 5 Hz. The main objective was to study the effect of the crack orientation on crack-length vs. number of cycles curves. © 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: Fatigue; Crack-growth; 17-4 PH; additive manufacturing; specimens Third European Conference on the Structural Integrity of Additively Manufactures Materials (ESIAM23) Fatigue crack-growth behavior of wrought and additively manufactured 17 - 4 PH stainless steel specimens America Califano a *, Flavia Bollino b , Filippo Berto c , Sepe Raffaele a a Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132, Fisciano SA 84084, Italy b Department of Engineering, Università della Campania “Luigi Vanvitelli”, Via Roma 29, Aversa 81031, Italy c Sapienza University of Rome, Department of Chemical Engineering, Materials, Environment, Italy Third European Conference on the Structural Integrity of Additively Manufactures Materials (ESIAM23) Fatigue crack-growth behavior of wrought and additively manufactured 17 - 4 PH stainless steel specimens America Califano a *, Flavia Bollino b , Filippo Berto c , Sepe Raffaele a a Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132, Fisciano SA 84084, Italy b Department of Engineering, Università della Campania “Luigi Vanvitelli”, Via Roma 29, Aversa 81031, Italy c Sapienza University of Rome, Department of Chemical Engineering, Materials, Environment, Italy

* Corresponding author: E-mail address: amcalifano@unisa.it * Corresponding author: E-mail address: amcalifano@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.2024.01.023