WEAR RESISTANCE OF NON-ISOTHERMAL NITRIDED TI-6AL-4V ALLOY IN TRIBO-PAIRS WITH UHMWPE AND NITRIDED TITANIUM ALLOY IN PHYSIOLOGICAL ENVIRONMENT

Authors

  • Dr. Oleh Tkachuk Karpenko Phisico-Mechanical Institute of the National Academy of Sciences of Ukraine
  • Prof. Dr. Serhii Sheykin V. Bakul Institute for Superhard Materials of the National Academy of Sciences of Ukraine
  • Prof. Iryna Pohrelyuk Karpenko Phisico-Mechanical Institute of the National Academy of Sciences of Ukraine
  • Dr. Sergiy Lavrys Karpenko Phisico-Mechanical Institute of the National Academy of Sciences of Ukraine
  • Prof. Dr. Mykhailo Student Karpenko Phisico-Mechanical Institute of the National Academy of Sciences of Ukraine
  • Dr. Igor Rostotskii V. Bakul Institute for Superhard Materials of the National Academy of Sciences of Ukraine

Keywords:

Ti-6Al-4V alloy, non-isothermal gas nitriding, wear resistance, physiological environment.

Abstract

In the process of non-isothermal gas nitriding, the nitride film consisted of tetragonal Ti2N and face-centered cubic TiN phases was formed on the surface of Ti-6Al-4V alloy. The tribological characteristics of the nitrided Ti-6Al-4V alloy in the tribo-pairs with nitrided titanium alloy and ultra-high molecular weight polyethylene (UHMWPE) were evaluated in a 10% aqueous solution of chondroitin sulfate, which simulates the synovial fluid. It was established that a tribo-pair "nitrided Ti-6Al-4V alloy – UHMWPE" provided significantly lower friction coefficient and wear intensity than a tribo-pair "nitrided Ti-6Al-4V alloy – nitrided titanium alloy". The main mechanisms of wear of the previously mentioned tribo-pairs were established.

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Published

2025-12-31

Issue

No. 12 (2024): Balttrib 2024

Section

TRIBOLOGICAL MATERIALS