Journal
TRIBOLOGY INTERNATIONAL
Volume 170, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.triboint.2022.107504
Keywords
Ti6Al4V alloy-UHMWPE pair; Near-dry cutting conditions; Surface topography; Friction and wear behavior; SBF environment
Categories
Funding
- program of the Polish Minister of Science and Higher Education under the name Regional Initiative of Excellence [003/RID/2018/19]
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The study systematically evaluated the effects of surface topography, processing, and environment conditions on the tribological contact between Ti6Al4V titanium alloy and UHMWPE friction pairs. The results showed that dry machining produced samples with slightly lower friction coefficient and temperature, while the MQL method led to reduced friction surface and significant wear accumulation. Additionally, the range of the Sa texture parameter varied when using dry and MQL methods.
The effects of surface topography, processing, and environment conditions during tribological contact between Ti6Al4V titanium alloy and UHMWPE friction pairs were systematically evaluated. Hence, in this research the polyethylene samples (blocks) having a constant surface roughness were rubbed against counter-bodies (rollers) made of titanium alloy with different roughness of surfaces. The counter-samples were manufactured using either dry machining and/or minimum quantity lubrication (MQL) conditions. Such cutting conditions are harmless to humans and the environment. Simulated body fluid (SBF) and distilled water was used to simulate the tribological trials. We have noted that the lubricant applied to protect the integrity of machined parts, the rollers, have only minor impact on the tribological features of the friction pairs tested. Further, the samples produced with dry machining demonstrated a slightly lower momentary friction coefficient and temperature. In contrast, the MQL method enable reduced friction surface and significant wear accumulation. Further, it was found that the minimum and maximum values of the Sa texture parameter associated to tribological parameters do not exceed 21% and 4%, when is used dry and MQL methods, respectively. Nevertheless, the distilled water revealed a much better wear resistance when comparing to SBF, and the later one trigger as well as an accentuated wear progress with different patterns. The results of the study are important in the design of new biomedical components produced by finish turning.
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