Ti6Al4V alloy has been widely used in dental applications, such as orthodontic mini-implants. However, it has been reported that fluoride ions could obviously accelerate the corrosion of implant materials and affect their performance. This work aimed to improve the F erosion resistance of Ti6Al4V alloy through the strategy of both Cu addition and grain refinement. As contrasted with Ti6Al4V alloy, both the coarse- and ultrafine-grained Ti6Al4V-5Cu alloys effectively mitigated the acceleration of the fluoride ions to the anode process, because Cu substituents blocked the continuous damage of doped in the passive film. Furthermore, grain refinement enhanced the protective ability of the passive film, more oxides and less adsorption amount of fluorides presented in the passive film of ultrafine-grained Ti6Al4V-5Cu alloy than those of coarse-grained Ti6Al4V-5Cu alloy. Under the combination of Cu alloying and grain refinement, the ultrafine-grained Ti6Al4V-5Cu alloy is greatly appropriate for the fabrication of orthodontic devices.

中文翻译：

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超细晶Ti6Al4V-5Cu合金在含氟离子人工唾液中的腐蚀行为


Ti6Al4V合金已广泛应用于牙科应用，例如正畸微型种植体。然而，有报道称氟离子会明显加速植入材料的腐蚀并影响其性能。本工作旨在通过添加Cu和细化晶粒的策略来提高Ti6Al4V合金的抗F侵蚀能力。与Ti6Al4V合金相比，粗晶粒和超细晶粒Ti6Al4V-5Cu合金均有效地减轻了氟离子向阳极过程的加速，因为Cu取代基阻止了钝化膜中掺杂的持续损伤。此外，晶粒细化增强了钝化膜的保护能力，与粗晶Ti6Al4V-5Cu合金相比，超细晶Ti6Al4V-5Cu合金的钝化膜中存在更多的氧化物和更少的氟化物吸附量。 Cu合金化和晶粒细化相结合，超细晶Ti6Al4V-5Cu合金非常适合正畸器件的制造。