Abstract
A micro-arc oxidation (MAO) coating was in–situ grew on Ti6Al4V alloy to improve the friction-wear performance, and the morphologies, chemical compositions and phases of obtained coating were analyzed using a scanning electron microscope, energy dispersive spectroscopy, and X–ray diffraction, respectively. The effect of normal load on the tribological performance of MAO coating at 400 °C was investigated on a ball–on–disc wear tester. The results show that the MAO coating exhibits irregular–pore structure, which is mainly composed of TiO2 phase. The coefficient of friction (COF) and wear rate of MAO coating under the normal load of 2 N are 0.32 and of 0.84 × 10–5 mm3 N−1 m−1, respectively, showing the best friction reduction and wear resistance among the three kinds of loads. The wear mechanism of MAO coating under the normal load of 2 N is abrasive wear; while those under the normal loads of 4 and 6 N are adhesion wear fatigue wear, respectively, in which the MAO coating has the tendency of plastic deformation with the increase of normal load.
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Chao, Z., Nan, W. & Dejun, K. Microstructure and Tribological Performance of Micro-Arc Oxidation Coating on Ti6Al4V Alloy. Trans Indian Inst Met 76, 961–967 (2023). https://doi.org/10.1007/s12666-022-02783-3
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DOI: https://doi.org/10.1007/s12666-022-02783-3