Aniołek Krzysztof, Barylski Adrian, Rak Jan
Faculty of Science and Technology, Institute of Materials Engineering, University of Silesia, 75 Pułku Piechoty 1A, 41-500 Chorzów, Poland.
Materials (Basel). 2024 Aug 20;17(16):4129. doi: 10.3390/ma17164129.
In this paper, the morphological, micromechanical and tribological characteristics of the Ti-6Al-4V ELI alloy after thermal oxidation (TO) were identified. TO was carried out at temperatures of 848 K, 898 K and 948 K over a period of 50 h. Microscopic examination revealed that an increase in temperature resulted in an improved uniformity of coverage and an increased oxide grain size. Micromechanical tests showed that TO of the Ti-6Al-4V ELI alloy led to an increase in hardness and deformation resistance. Following oxidation, a decrease (by approximately 10-22%) was observed in the total mechanical work of indentation, W, compared to the as-received material. The formation of protective oxide films on the Ti-6Al-4V ELI alloy also led to the improvement of tribological characteristics, both when tested under dry friction conditions and in Ringer's solution. The sliding wear resistance increased with an increase in the oxidation temperature. However, a greater degree of wear reduction (by approximately 30-50%) was found for the lubricated contact in comparison with the dry friction tests. Surface roughness also increased with the increase in temperature.
在本文中，对热氧化（TO）后的Ti-6Al-4V ELI合金的形态、微观力学和摩擦学特性进行了鉴定。热氧化在848 K、898 K和948 K的温度下进行，持续50小时。微观检查表明，温度升高导致覆盖均匀性提高和氧化晶粒尺寸增大。微观力学测试表明，Ti-6Al-4V ELI合金的热氧化导致硬度和抗变形能力增加。氧化后，与原始材料相比，压痕总机械功W降低了约10-22%。在Ti-6Al-4V ELI合金上形成的保护性氧化膜也导致了摩擦学特性的改善，无论是在干摩擦条件下还是在林格氏溶液中进行测试时。滑动耐磨性随着氧化温度的升高而增加。然而，与干摩擦试验相比，润滑接触的磨损减少程度更大（约30-50%）。表面粗糙度也随着温度的升高而增加。
