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Funding","award":["UIDP\/50022\/2020"],"award-info":[{"award-number":["UIDP\/50022\/2020"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JFB"],"abstract":"<jats:p>Laser powder bed fusion (L-PBF) is one of the most promising additive manufacturing technologies for creating customised 316L Stainless Steel (SS) implants with biomimetic characteristics, controlled porosity, and optimal structural and functional properties. However, the behaviour of as-fabricated 3D 316L SS structures without any surface finishing in environments that simulate body fluids remains largely unknown. To address this knowledge gap, the present study investigates the surface characteristics, the internal porosity, the corrosion in simulated body fluid (SBF), and the mechanical properties of as-fabricated 316L SS structures manufactured by L-PBF with rhombitruncated cuboctahedron (RTCO) unit cells with two distinct relative densities (10 and 35%). The microstructural analysis confirmed that the RTCO structure has a pure austenitic phase with a roughness of ~20 \u00b5m and a fine cellular morphology. The micro-CT revealed the presence of keyholes and a lack of fusion pores in both RTCO structures. Despite the difference in the internal porosity, the mechanical properties of both structures remain within the range of bone tissue and in line with the Gibson and Ashby model. Additionally, the as-fabricated RTCO structures demonstrated passive corrosion behaviour in the SBF solution. Thus, as-fabricated porous structures are promising biomaterials for implants due to their suitable surface roughness, mechanical properties, and corrosion resistance, facilitating bone tissue growth.<\/jats:p>","DOI":"10.3390\/jfb15100313","type":"journal-article","created":{"date-parts":[[2024,10,21]],"date-time":"2024-10-21T09:58:24Z","timestamp":1729504704000},"page":"313","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Mechanical and Corrosion Behaviour in Simulated Body Fluid of As-Fabricated 3D Porous L-PBF 316L Stainless Steel Structures for Biomedical Implants"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4848-2614","authenticated-orcid":false,"given":"Pedro","family":"Nogueira","sequence":"first","affiliation":[{"name":"IDMEC\u2014Institute of Mechanical Engineering, Instituto Superior T\u00e9cnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7376-8104","authenticated-orcid":false,"given":"Jo\u00e3o","family":"Magrinho","sequence":"additional","affiliation":[{"name":"IDMEC\u2014Institute of Mechanical Engineering, Instituto Superior T\u00e9cnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9848-9569","authenticated-orcid":false,"given":"Luis","family":"Reis","sequence":"additional","affiliation":[{"name":"IDMEC\u2014Institute of Mechanical Engineering, Instituto Superior T\u00e9cnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0451-6245","authenticated-orcid":false,"given":"Augusto Moita","family":"de Deus","sequence":"additional","affiliation":[{"name":"CeFEMA\u2014Center of Physics and Engineering of Advanced Materials, Instituto Superior T\u00e9cnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5284-8391","authenticated-orcid":false,"given":"Maria Beatriz","family":"Silva","sequence":"additional","affiliation":[{"name":"IDMEC\u2014Institute of Mechanical Engineering, Instituto Superior T\u00e9cnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0009-0001-5442-5632","authenticated-orcid":false,"given":"Pedro","family":"Lopes","sequence":"additional","affiliation":[{"name":"INEGI, Faculty of Engineering, University of Porto, 4200-465 Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2180-0376","authenticated-orcid":false,"given":"Lu\u00eds","family":"Oliveira","sequence":"additional","affiliation":[{"name":"INEGI, Faculty of Engineering, University of Porto, 4200-465 Porto, Portugal"}]},{"given":"Ant\u00f3nio","family":"Castela","sequence":"additional","affiliation":[{"name":"Instituto Polit\u00e9cnico de Set\u00fabal, EST Set\u00fabal, Campus IPS, 2910-761 Set\u00fabal, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4773-1957","authenticated-orcid":false,"given":"Ricardo","family":"Cl\u00e1udio","sequence":"additional","affiliation":[{"name":"Instituto Polit\u00e9cnico de Set\u00fabal, EST Set\u00fabal, Campus IPS, 2910-761 Set\u00fabal, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9327-9092","authenticated-orcid":false,"given":"Jorge L.","family":"Alves","sequence":"additional","affiliation":[{"name":"INEGI, Faculty of Engineering, University of Porto, 4200-465 Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1629-523X","authenticated-orcid":false,"given":"Maria F\u00e1tima","family":"Vaz","sequence":"additional","affiliation":[{"name":"IDMEC\u2014Institute of Mechanical Engineering, Instituto Superior T\u00e9cnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0110-187X","authenticated-orcid":false,"given":"Maria","family":"Carmezim","sequence":"additional","affiliation":[{"name":"Instituto Polit\u00e9cnico de Set\u00fabal, EST Set\u00fabal, Campus IPS, 2910-761 Set\u00fabal, Portugal"},{"name":"CQE, IMS, Instituto Superior T\u00e9cnico, Universidade de Lisboa, Av. 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