Publication
Fatigue behaviour of selective laser melting steel components
| dc.contributor.author | Santos, L.M.S. | |
| dc.contributor.author | Ferreira, J.A.M. | |
| dc.contributor.author | Jesus, J.S. | |
| dc.contributor.author | Costa, J.M. | |
| dc.contributor.author | C. Capela | |
| dc.date.accessioned | 2025-05-28T14:45:04Z | |
| dc.date.available | 2025-05-28T14:45:04Z | |
| dc.date.issued | 2016-10 | |
| dc.description.abstract | Selective laser melting (SLM) is a laser based rapid manufacturing technology that builds metal parts layer-by-layer using metal powders and a computer controlled laser. Various important aspects strongly affect the mechanical properties of sintered metal components, such as: porosity, surface roughness, scan speed, layer thickness, and residual stresses. Therefore, properties of SLM manufactured parts must be carefully analysed, particularly under fatigue conditions. The purpose of this work was to study the effect of scan speed, porosity and microstructure on the mechanical properties and fatigue strength of sintered laser samples. Sintered laser parts were manufactured in maraging steel AISI 18Ni300. Fatigue behaviour is related to process parameters, such as: surface residual stresses, microstructure and porosity. The results showed that a very high scan speed (400 or 600 mm/s) causes the appearance of high percentages of porosity and a consequent drastic reduction of tensile strength and stiffness. Fatigue behaviour was assessed in terms of the traditional S-N curves and of the da/dN–DK crack propagation curves. Fatigue life predictions based on Hartman and Schijve’s equation underestimated significantly fatigue lives, particularly for low stress levels. The results of the tests performed at variable amplitude loading were well fitted by Miner’s law. | eng |
| dc.description.sponsorship | The authors would like to acknowledge the sponsoring under the project number 016713 (PTDC/EMS-PRO/1356/2014) financed by Project 3599 Promover a Produção Científica e Desenvolvimento Tecnológico e a Constituição de Redes Temáticas (3599-PPCDT) and FEDER funds and also EROFIO S.A. industry for the supply of the testing samples. | |
| dc.identifier.citation | L.M.S. Santos, J.A.M. Ferreira, J.S. Jesus, J.M. Costa, C. Capela, Fatigue behaviour of selective laser melting steel components, Theoretical and Applied Fracture Mechanics, Volume 85, Part A, 2016, Pages 9-15, ISSN 0167-8442, https://doi.org/10.1016/j.tafmec.2016.08.011. | |
| dc.identifier.doi | 10.1016/j.tafmec.2016.08.011 | |
| dc.identifier.issn | 0167-8442 | |
| dc.identifier.uri | http://hdl.handle.net/10400.8/13020 | |
| dc.language.iso | eng | |
| dc.peerreviewed | yes | |
| dc.publisher | Elsevier BV | |
| dc.relation.hasversion | https://www.sciencedirect.com/science/article/pii/S0167844216301264?via%3Dihub | |
| dc.relation.ispartof | Theoretical and Applied Fracture Mechanics | |
| dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | |
| dc.subject | Laser sintering metal | |
| dc.subject | Fatigue | |
| dc.subject | Functional materials | |
| dc.subject | Mechanical properties | |
| dc.subject | Structural Integrity | |
| dc.title | Fatigue behaviour of selective laser melting steel components | eng |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.citation.endPage | 15 | |
| oaire.citation.startPage | 9 | |
| oaire.citation.title | Theoretical and Applied Fracture Mechanics | |
| oaire.citation.volume | 85 | |
| oaire.version | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |
| person.familyName | Capela | |
| person.givenName | Carlos | |
| person.identifier.ciencia-id | 9B1E-6857-3D6B | |
| person.identifier.orcid | 0000-0003-3334-4945 | |
| person.identifier.rid | G-6395-2016 | |
| person.identifier.scopus-author-id | 7801358401 | |
| relation.isAuthorOfPublication | 9b079aa3-b79b-4395-b081-1f23d6a17514 | |
| relation.isAuthorOfPublication.latestForDiscovery | 9b079aa3-b79b-4395-b081-1f23d6a17514 |