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. 2023 Oct 12;15(20):4060. doi: 10.3390/polym15204060

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© 2023 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Tribological properties of the bare Ti6Al4V under different loads and at different velocities: (a₁) the average friction coefficients under different loads; (a₂) the friction coefficients versus time under different loads; (a₃) wear morphologies of the bare Ti6Al4V and the PTFE ball under the load of 40 N; (b₁) the average friction coefficients under different velocities; (b₂) the friction coefficients versus time under different velocities; (b₃) wear morphologies of the bare Ti6Al4V and the PTFE ball at the velocity of 24 mm/s.