PSI - Issue 37

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

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

Procedia Structural Integrity 37 (2022) 462–468

© 2022 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 Pedro Miguel Guimaraes Pires Moreira Abstract This paper studies the cyclic deformation behaviour of AlSi10Mg aluminium alloy manufactured by laser-beam powder bed fusion for different processing states, namely in the as-built, stress-relieved, and T6 conditions. Low-cycle fatigue tests (R  = -1) are performed using the single step test method, at room temperature, with a constant strain rate, under strain control mode for strain amplitudes in the range 0.2-1.5%. The main results show that the processing route clearly affects the cyclic stress-strain response of the tested alloy. The strain energy density per cycle of the stress-relived and T6 conditions is much smaller than that of the as built sate, which is explained by a reduction of the linear portion of hysteresis loops. For lower lives, stress-relieved and T6 conditions led to higher fatigue lives at the same strain amplitude. In addition, on log-log scales, a bi-linear relationship between the plastic strain amplitude and the number of reversals to failure was found for the as-built and stress-relief conditions. On the contrary, for the T6 condition, the data were fitted via a linear function. © 2022 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 Pedro Miguel Guimaraes Pires Moreira Keywords: AlSi10Mg aluminium alloy; selective laser melting; low-cycle fatigue; cyclic plastic behaviour ICSI 2021 The 4th International Conference on Structural Integrity Cyclic deformation behaviour of AlSi10Mg aluminium alloy manufactured by laser-beam powder bed fusion R. Fernandes a , J. de Jesus a , R. Branco a, *, L.P. Borrego a,b , J.A. Martins Ferreira a a University of Coimbra, CEMMPRE, Department of Mechanical Engineering, Coimbra, Portugal b Department of Mecha ical Engineering, Coimbra olytechnic - ISEC, Rua Pedro Nu es, Qui ta da Nora, 3030-199 Coimbra, Portugal Abstract This paper studies the cyclic deformation behaviour of AlSi10Mg aluminium alloy manufactured by laser-beam powder bed fusion for different processing states, na ely in t e as-built, stress-relieved, and T6 conditions. Low-c cle fatigue tests (R  = -1) are pe formed using the single step test method, at room emp rature, with constant stra n rate, under strain control mode for str in amplitudes in the range 0.2-1.5%. The main results show that th processing route clearly affects the cycli stress-strain response of the tested alloy. Th strain energy dens ty per cycle of e s r ss-relived and T6 onditions is much smaller than h t of the a - built sate, which is explained by a reduction of the linear po tion of hysteresis lo ps. For lower lives, stress-relieved and T6 conditions led to higher f tigue lives at the same strain amplitude. In addition, on g-log scales, a bi-linear lationship between the plastic strain amplitude and th numb r of r versals to failur was found f r the as-built and stress-relief conditions. On the contrary, for the T6 condition, the data were fitted via a linear f nction. © 2022 The Authors. Publ shed 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 u der re ponsibility of Pedro Miguel Guimara s Pires Moreira K ywords: AlSi10Mg aluminium alloy; selective laser melting; low-cycl fatigu ; cyclic plastic behaviour 1. Introduction Aluminium alloys have proven to be technically superior materials for a wide range of engineering applications, ICSI 2021 The 4th International Conference on Structural Integrity Cyclic deformation behaviour of AlSi10Mg aluminium alloy manufactured by laser-beam powder bed fusion R. Fernandes a , J. de Jesus a , R. Branco a, *, L.P. Borrego a,b , J.A. Martins Ferreira a a University of Coimbra, CEMMPRE, Department of Mechanical Engineering, Coimbra, Portugal b Department of Mechanical Engineering, Coimbra Polytechnic - ISEC, Rua Pedro Nunes, Quinta da Nora, 3030-199 Coimbra, Portugal 1. Introduction Aluminium alloys have proven to be technically superior materials for a wide range of engineering applications,

* Corresponding author. Tel.: +351-239790700; fax: +351- 239403407. E-mail address: ricardo.branco@dem.uc.pt * Corresponding author. Tel.: +351-239790700; fax: +351- 239403407. E-mail address: ricardo.branco@dem.uc.pt

2452-3216 © 2022 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 Pedro Miguel Guimaraes Pires Moreira 2452-3216 © 2022 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 u der responsibility of Pedro Miguel Guimara s Pires Moreira

2452-3216 © 2022 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 Pedro Miguel Guimaraes Pires Moreira 10.1016/j.prostr.2022.01.110