Full
Outline
Utilizing laser processing techniques to fabricate groove-shaped microstructures on the surface of Ti-6Al-4V alloy， and an oxide film is prepared on the surface of the textured samples using thermal oxidation method. Friction and wear tests are conducted to investigate the tribological behavior of Ti-6Al-4V alloy subjected to different surface treatments under ambient dry sliding conditions. Surface morphology， cross-sectional morphology， elemental distribution， surface microhardness before wear testing， as well as microstructural and three-dimensional wear profile changes after wear testing， are analyzed using scanning electron microscopy （SEM）， energy-dispersive X-ray spectroscopy （EDS）， three-dimensional optical microscopy， and micro-Vickers hardness testing. The advantages of laser-textured combined with thermal oxidation treatments compared to single laser-textured or thermal oxidation treatment are revealed， as well as the mechanisms of wear resistance and friction reduction. The results indicate that the laser-textured combined with thermal oxidation samples exhibit more stable friction coefficients with less fluctuation compared to samples undergoing single treatments. At a normal load of 3 N， the wear rates laser-textured combined with thermal oxidation samples decrease by 66% and 68% relative to the single laser-textured and single thermal oxidation samples，respectively. As the normal load increases to 10 N， the wear rate reductions are 27% and 38%. Furthermore， the laser-textured combined with thermal oxidation samples show the disappearance of abrasive wear and a reduction in adhesive wear phenomena. They can simultaneously possess the ability to capture wear debris like a single laser-textured samples and the excellent load-carrying capacity of a single thermal oxidation samples， thereby forming multi-film protective mechanism on the substrate and effectively enhancing the tribological performance of Ti-6Al-4V alloy surfaces under dry friction conditions.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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