Assessment the SlidingWear Behavior of Laser Microtexturing Ti6Al4V under Wet Conditions

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2019-01Department
Ingeniería Mecánica y Diseño IndustrialSource
Coatings 2019, 9, 67Abstract
Laser micro-texturing processes, compared to untreated surfaces, can improve the friction,
wear and wettability behavior of sliding parts. This improvement is related to the micro-geometry and
the dimensions of the texture which is also dependent on the processing parameters. This research
studied the effect of laser textured surfaces on the tribological behavior of titanium alloy Ti6Al4V.
The influence of processing parameters was analyzed by changing the scanning speed of the beam
and the energy density of pulse. First, the characterization of dimensional and geometrical features
of the texturized tracks was carried out. Later, their influence on the wetting behavior was also
evaluated through contact angle measurements using water as a contact fluid. Then, the tribological
performance of these surfaces was analyzed using a ball-on-flat reciprocating tribometer under wet
and dry conditions. Finally, wear mechanisms were identified employing electronic and optical
microscopy techniques capable to evaluate the wear tracks on Ti surfaces and WC–Co spheres. These
analyses had determined a strong dependence between the wear behavior and the laser patterning
parameters. Wear friction effects were reduced by up to a 70% replacing conventional untreated
surfaces of Ti6Al4V alloy with laser textured surfaces.
Subjects
surface modification; laser texturing; wetting behavior; Ti6Al4V; surface characterization; tribology; wear behaviorCollections
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