PSI - Issue 53

ScienceDirect Available online at www.sciencedirect.com ScienceDirect Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000–000 Available online at www.sciencedirect.com Procedia Structural Integrity 53 (2024) 236–245 Structural Integrity Procedia 00 (2022) 000–000

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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.2024.01.029 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 * Corresponding author: E-mail address: t.morgado@fct.unl.pt 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 © 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 The present study aimed to develop a new life prediction model of a Ti-6Al-4V alloy obtained by additive manufacturing (AM). The Selective Laser Melting (SLM) method was used to obtain specimens. This study contemplates four phases. The first phase encompasses an analysis of the manufacturing process, including the raw materials cycle, specimen design, and the cutting process. In the second phase, tensile and fatigue tests are conducted to obtain the elastic and plastic proprieties and fatigue parameters (S N Curve). The third phase involves an analytical and quantitative study of the manufacturing intrinsic defects of the SLM process, using optical microscopy, micro and nanotomography, and image treatment. The last phase focused on developing a life prediction model for Ti-6Al-4V based on experimental findings from the preceding steps. In conclusion, Ti-6Al-4V alloy obtained by additive manufacturing showed better overall mechanical properties when compared to the same alloy produced by a traditional method, exhibiting robust plastic behaviour and good ductility. Concerning life prediction models, two new models were developed to predict the fatigue limit of a Ti-6Al-4V obtained by additive manufacturing based on two different defect quantification methods. Abstract The present study aimed to develop a new life prediction model of a Ti-6Al-4V alloy obtained by additive manufacturing (AM). The Selective Laser Melting (SLM) method was used to obtain specimens. This study contemplates four phases. The first phase encompasses an analysis of the manufacturing process, including the raw materials cycle, specimen design, and the cutting process. In the second phase, tensile and fatigue tests are conducted to obtain the elastic and plastic proprieties and fatigue parameters (S N Curve). The third phase involves an analytical and quantitative study of the manufacturing intrinsic defects of the SLM process, using optical microscopy, micro and nanotomography, and image treatment. The last phase focused on developing a life prediction model for Ti-6Al-4V based on experimental findings from the preceding steps. In conclusion, Ti-6Al-4V alloy obtained by additive manufacturing showed better overall mechanical properties when compared to the same alloy produced by a traditional method, exhibiting robust plastic behaviour and good ductility. Concerning life prediction models, two new models were developed to predict the fatigue limit of a Ti-6Al-4V obtained by additive manufacturing based on two different defect quantification methods. © 2023 The Authors. Published by ELSEVIER B.V. Third European Conference on the Structural Integrity of Additively Manufactures Materials (ESIAM23) Development of a Life Prediction Model of Ti-6Al-4V obtained by Additive Manufacturing João Alves 1 , Teresa Morgado 1,2,3,4 *, Ivan Galvão 1,5 , António Pereira 6 , Manuel Pereira 7 1 Lisbon School of Engineering of Polytechnic Institute of Lisbon, Portugal 2 UNIDEMI - Research & Development Unit in Mechanical and Industrial Engineering, Department of Mechanical and Industrial Engineering, FCT NOVA - Faculty of Science and Technology, Universidade Nova de Lisboa, Almada, Portugal 3 Intelligent Systems Associate Laboratory, Guimarães, Portugal 4 Navy Research Center, Almada, Portugal 5 CEMMPRE – Centre for Mechanical Engineering, Materials and Processes, Department of Mechanical Engineering, University of Coimbra, Coimbra, Portugal 6 CDRsp & ESTG - Centre for Rapid and Sustainable Product Development & School of Technology and Management of Institute Polytechnic of Leiria, Leiria, Portugal 7 CERENA- Center of Natural Resources and Environment, Univerdade Lisboa, Lisboa, Portugal Third European Conference on the Structural Integrity of Additively Manufactures Materials (ESIAM23) Development of a Life Prediction Model of Ti-6Al-4V obtained by Additive Manufacturing João Alves 1 , Teresa Morgado 1,2,3,4 *, Ivan Galvão 1,5 , António Pereira 6 , Manuel Pereira 7 1 Lisbon School of Engineering of Polytechnic Institute of Lisbon, Portugal 2 UNIDEMI - Research & Development Unit in Mechanical and Industrial Engineering, Department of Mechanical and Industrial Engineering, FCT NOVA - Faculty of Science and Technology, Universidade Nova de Lisboa, Almada, Portugal 3 Intelligent Systems Associate Laboratory, Guimarães, Portugal 4 Navy Research Center, Almada, Portugal 5 CEMMPRE – Centre for Mechanical Engineering, Materials and Processes, Department of Mechanical Engineering, University of Coimbra, Coimbra, Portugal 6 CDRsp & ESTG - Centre for Rapid and Sustainable Product Development & School of Technology and Management of Institute Polytechnic of Leiria, Leiria, Portugal 7 CERENA- Center of Natural Resources and Environment, Univerdade Lisboa, Lisboa, Portugal © 2023 The Authors. Published by ELSEVIER B.V. * Corresponding author: E-mail address: t.morgado@fct.unl.pt