Triboelectrochemical Performance of Electron Beam–Melted Ti‐6Al‐4V‐ELI for Biomedical Applications
Titanium alloys have been widely used for biomaterials’ production due to their high physicochemical stability, mechanical resistance, and biocompatibility. Currently, additive manufacturing (AM) techniques using electron beam melting (EBM) technology have been used to produce implantable medical and dental devices. In the present work, the effect of five different scanning speed on the tribocorrosion behavior of Ti‐6Al‐4V‐ELI (extra low interstitials) alloy was evaluated in Ringer’s saline solution, at 25°C, under a 10‐N normal force in both cathodic and anodic regions to provide a basis for properly deriving the tribological constants of this EBM alloy. A tribometer coupled with a potentiostat/galvanostat, was used to rub the Ti‐6Al‐4V‐ELI disks against alumina balls. The tribocorrosion tests were carried out for 50 min for each sample. The open circuit potential and corrosion current densities were monitored for 10 min, then concomitant with wear tests during 30 min, and finally for more 10 min, without wear. The scratched surfaces were characterized by confocal laser scanning microscopy. The results indicated that the tribocorrosion behavior is influenced by the Ti‐6Al‐4V‐ELI surface finishing. The open circuit potential quickly dropped from −0.55 to −0.75 (V/ Ag/AgCl ) for all samples during tribological application, then returned to nobler values after the application was removed, with the highest values being obtained for Disks 2 and 4. An opposite effect was observed during the chronoamperometry tests. The wear rate depends on the electrolyte, which serves as both a corrosive environment and a tribological lubricant and is closely linked to the speed variation in the EBM manufacturing process. In all cases, the disks produced with EBM scan speed Parameters 1 and 5 showed the highest wear rates.
Citação
@online{e._f.2025,
author = {E. F. , Pieretti and L. C. E. , Silva and M. S. , Ribeiro
and Rossi, W., De and R. A. , Antunes and M. C. L. , Oliveira and D.
, Piaggio and F. P. A. , Cruz and Paz, J. O., Da and Neves, M. D.
M., Das},
title = {Triboelectrochemical Performance of Electron Beam–Melted
Ti‐6Al‐4V‐ELI for Biomedical Applications},
volume = {2025},
number = {1},
date = {2025-01-01},
doi = {10.1155/amse/8059229},
langid = {pt-BR},
abstract = {Titanium alloys have been widely used for biomaterials’
production due to their high physicochemical stability, mechanical
resistance, and biocompatibility. Currently, additive manufacturing
(AM) techniques using electron beam melting (EBM) technology have
been used to produce implantable medical and dental devices. In the
present work, the effect of five different scanning speed on the
tribocorrosion behavior of Ti‐6Al‐4V‐ELI (extra low interstitials)
alloy was evaluated in Ringer’s saline solution, at 25°C, under a
10‐N normal force in both cathodic and anodic regions to provide a
basis for properly deriving the tribological constants of this EBM
alloy. A tribometer coupled with a potentiostat/galvanostat, was
used to rub the Ti‐6Al‐4V‐ELI disks against alumina balls. The
tribocorrosion tests were carried out for 50 min for each sample.
The open circuit potential and corrosion current densities were
monitored for 10 min, then concomitant with wear tests during 30
min, and finally for more 10 min, without wear. The scratched
surfaces were characterized by confocal laser scanning microscopy.
The results indicated that the tribocorrosion behavior is influenced
by the Ti‐6Al‐4V‐ELI surface finishing. The open circuit potential
quickly dropped from −0.55 to −0.75 (V/ Ag/AgCl ) for all samples
during tribological application, then returned to nobler values
after the application was removed, with the highest values being
obtained for Disks 2 and 4. An opposite effect was observed during
the chronoamperometry tests. The wear rate depends on the
electrolyte, which serves as both a corrosive environment and a
tribological lubricant and is closely linked to the speed variation
in the EBM manufacturing process. In all cases, the disks produced
with EBM scan speed Parameters 1 and 5 showed the highest wear
rates.}
}