Manufacturing and characterization of in-situ alloyed Ti6Al4V(ELI)-3 at.% Cu by laser powder bed fusion

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dc.contributor.authorVilardell, A. M.en_ZA
dc.contributor.authorYadroitsev, I.en_ZA
dc.contributor.authorYadroitsava, I.en_ZA
dc.contributor.authorAlbu, M.en_ZA
dc.contributor.authorTakata, N.en_ZA
dc.contributor.authorKobashi, M.en_ZA
dc.contributor.authorKrakhmalev, P.en_ZA
dc.contributor.authorKouprianoff, D.en_ZA
dc.contributor.authorKothleitne, G.en_ZA
dc.contributor.authorDu Plessis, A.en_ZA
dc.date.accessioned2022-01-20T09:46:01Z
dc.date.available2022-01-20T09:46:01Z
dc.date.issued2020
dc.descriptionCITATION: Vilardell, A. M., et al. 2020. Manufacturing and characterization of in-situ alloyed Ti6Al4V(ELI)-3 at.% Cu by laser powder bed fusion. Additive Manufacturing, 36:101436, doi:1016/j.addma.2020.101436.
dc.descriptionThe original publication is available at http://www.scielo.org.za
dc.description.abstractBiofunctionalization of Ti6Al4V alloy with metallic agents like Ag or Cu is a promising approach to add anti-bacterial properties and thus to reduce the risk of implant failure. This research investigates the in-situ alloying of Ti6Al4V(ELI) with 3 at.% Cu powders using Laser Powder Bed Fusion (L-PBF). The morphology and geometrical characteristics of the single tracks and layers were studied. Laser powers of 170 W and 340 W, and scanning speeds ranging from 0.4 to 1.4 m/s and 0.8–2.8 m/s were implemented. Single track results showed balling effect and humping at high scanning speeds, 1.4 m/s and 1.6 m/s, for each laser powder respectively. Conversely, keyhole formation occurred at lower scanning speeds of 0.4–0.6 m/s for 170 W laser power, and below and 0.8 m/s for 340 W laser power. For both laser powers, single layers resulted in smoother surfaces at lower scanning speeds. These results were used for the development of optimal process parameters for 3D cubes with 99.9 % density. Optimal process parameters were found for 170 W and 340 W laser powders at 0.7−0.9 and 1.0–1.2 m/s scanning speeds, respectively. In-situ alloying by L-PBF was challenging and a homogeneous distribution of Cu within the alloy was hard to achieve. The increase in laser power from 170 to 340 W resulted in small increase in homogenization. Microstructural analyses after stress-relieving treatment showed the presence of α’ and β phases, as well as CuTi₂ intermetallic precipitates. The finer microstructure together with CuTi₂ intermetallic precipitates resulted in an increase in hardness. This study demonstrates the potential for printing in-situ alloyed Ti6Al4V(ELI)- 3 at.% Cu for biomedical applications. However, further studies are required to determine the effectiveness of antibacterial properties.en_ZA
dc.description.urihttps://www.sciencedirect.com/science/article/pii/S2214860420308083
dc.description.versionPublisher's version
dc.format.extent14 pages
dc.identifier.citationVilardell, A. M., et al. 2020. Manufacturing and characterization of in-situ alloyed Ti6Al4V(ELI)-3 at.% Cu by laser powder bed fusion. Additive Manufacturing, 36:101436, doi:1016/j.addma.2020.101436
dc.identifier.issn2214-8604 (online)
dc.identifier.issn2214-7810 (print)
dc.identifier.otherdoi:1016/j.addma.2020.101436
dc.identifier.urihttp://hdl.handle.net/10019.1/124122
dc.language.isoen_ZAen_ZA
dc.publisherElsevier
dc.rights.holderAuthor retains copyright
dc.subjectLaser powder bed fusionen_ZA
dc.subjectBiomedical materialsen_ZA
dc.subjectThree-dimentional printingen_ZA
dc.subjectAdditive manufacturingen_ZA
dc.titleManufacturing and characterization of in-situ alloyed Ti6Al4V(ELI)-3 at.% Cu by laser powder bed fusionen_ZA
dc.typeArticleen_ZA
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