The poor biotribological properties and bioinertness
of Ti6Al4V
have restricted its application in biomedical materials. In this study,
microgrooves of different widths were prepared on the surface of a
Ti6Al4V alloy by laser treatment. The tribological properties under
dry lubrication and simulated body fluid (SBF) lubrication conditions,
the electrochemical corrosion properties in SBF solution, and the
bone marrow mesenchymal stem cell (BMSC) behavior on the surfaces
were systematically tested. The corresponding mechanisms were discussed.
The results showed that Ti6Al4V with a microgroove width of 45 μm
(Ti64-45) exhibited excellent wear resistance with decreasing wear
rates of 89.79 and 85.43% under dry friction and SBF lubrication compared
to the Ti64 sample, which might be due to the increase of surface
microhardness. Moreover, the excellent anticorrosion performance of
Ti64-45 was attributed to the grain refinement on the titanium alloy
surface with a lower volume fraction ratio of β phase to α
phase. In addition, the microgrooves with a width of 45 μm are
more conducive to BMSC proliferation and adhesion, related to promoting
cell signal transduction due to cell extrusion. These studies imply
that the microgroove structures are potential for application in the
medical field.
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