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<p>The sliding and impact wear properties of CrN and TiN coatings deposited on titanium alloy (TC4) substrate were investigated. The results demonstrated that CrN and TiN coatings significantly enhanced wear resistance, reducing the sliding wear rate to approximately 1/100 of the uncoated TC4 substrate. The TiN coating showed higher resistance to plastic deformation, as indicated by its <i>H</i>/<i>E</i> (0.042) and <i>H</i><sup>3</sup>/<i>E</i><sup>2</sup> (0.039) ratios, compared to the CrN coating (0.039 and 0.021, respectively). During impact wear tests, the TiN coating absorbed only 3.5&#xa0;mJ of energy after 10<sup>4</sup> cycles, with an energy absorption rate of 80%, outperforming both the CrN coating (3.7&#xa0;mJ, 83%) and the TC4 substrate (4.5&#xa0;mJ, 85%). Additionally, the TiN coating exhibited the lowest volume loss (15 × 10<sup>3</sup>&#xa0;μm<sup>3</sup>) and wear depth, demonstrating its exceptional load-bearing capacity, adhesion strength (critical load Lc2 = 41.6&#xa0;N), and impact resistance. These findings highlight the potential of TiN coatings to address the poor impact and fatigue properties of titanium alloys, offering significant benefits for aerospace and industrial applications.</p>

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Evaluation of Impact Wear Behavior and Damage Mechanisms of CrN and TiN Coatings on Titanium Alloy Substrates

  • 期刊论文

  • 发表日期：

    2025年9月16日

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  • Chenglong Mou,
  • Xiaodong He,
  • Zhengyu Liu,
  • Guangan Zhang,
  • Lunlin Shang,
  • Xueqian Cao

摘要

The sliding and impact wear properties of CrN and TiN coatings deposited on titanium alloy (TC4) substrate were investigated. The results demonstrated that CrN and TiN coatings significantly enhanced wear resistance, reducing the sliding wear rate to approximately 1/100 of the uncoated TC4 substrate. The TiN coating showed higher resistance to plastic deformation, as indicated by its H/E (0.042) and H3/E2 (0.039) ratios, compared to the CrN coating (0.039 and 0.021, respectively). During impact wear tests, the TiN coating absorbed only 3.5 mJ of energy after 104 cycles, with an energy absorption rate of 80%, outperforming both the CrN coating (3.7 mJ, 83%) and the TC4 substrate (4.5 mJ, 85%). Additionally, the TiN coating exhibited the lowest volume loss (15 × 103 μm3) and wear depth, demonstrating its exceptional load-bearing capacity, adhesion strength (critical load Lc2 = 41.6 N), and impact resistance. These findings highlight the potential of TiN coatings to address the poor impact and fatigue properties of titanium alloys, offering significant benefits for aerospace and industrial applications.