Ductility Improvement Due To Martensite α' Decomposition In Porous Ti-6al-4v Parts Produced By Selective Laser Melting For Orthopedic Implants.

dc.creatorSallica-Leva, E
dc.creatorCaram, R
dc.creatorJardini, A L
dc.creatorFogagnolo, J B
dc.date2016-Feb
dc.date2016-05-23T19:39:45Z
dc.date2016-05-23T19:39:45Z
dc.date.accessioned2018-03-29T01:27:24Z
dc.date.available2018-03-29T01:27:24Z
dc.identifierJournal Of The Mechanical Behavior Of Biomedical Materials. v. 54, p. 149-158, 2016-Feb.
dc.identifier1878-0180
dc.identifier10.1016/j.jmbbm.2015.09.020
dc.identifierhttp://www.ncbi.nlm.nih.gov/pubmed/26458113
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/235125
dc.identifier26458113
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1303368
dc.descriptionTi-6Al-4V parts obtained by selective laser melting typically have an acicular α' martensitic microstructure whose ductility is low. Thus, post-heat treatments are useful for increasing ductility. In this work, the effects of sub-β-transus heat treatments on the mechanical properties of Ti-6Al-4V parts with porous structures are correlated with martensite α' phase decomposition. The precipitation of β phase and the gradual transformation of α' into α phase by the diffusion of excess vanadium from α' to β phase are proposed to be the main events of martensite α' phase decomposition in parts fabricated by selective laser melting. The heat treatment performed at 650°C for 1h produced no microstructural changes, but the samples treated for at the same temperature 2h showed a fine precipitation of β phase along the α' needle boundaries. The heat treatment performed at 800°C for 1 or 2h produced a fine α+β microstructure, in which β phase are present as particles fewer in number and larger in size, when compared with the ones present in the sample heat-treated at 650°C for 2h. Heat-treatment of the parts at 800°C for 2h proved to be the best condition, which improved the ductility of the samples while only slightly reducing their strength.
dc.description54
dc.description149-158
dc.languageeng
dc.relationJournal Of The Mechanical Behavior Of Biomedical Materials
dc.relationJ Mech Behav Biomed Mater
dc.rightsembargo
dc.sourcePubMed
dc.subjectAdditive Manufacturing
dc.subjectMechanical Properties
dc.subjectThermal Analysis
dc.subjectThermal Treatment
dc.subjectTitanium Alloys
dc.subjectX-ray Analysis
dc.titleDuctility Improvement Due To Martensite α' Decomposition In Porous Ti-6al-4v Parts Produced By Selective Laser Melting For Orthopedic Implants.
dc.typeArtículos de revistas


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