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首页> 美国卫生研究院文献>Materials >An Investigation on the Wear Resistance and Fatigue Behaviour of Ti-6Al-4V Notched Members Coated with Hydroxyapatite Coatings
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An Investigation on the Wear Resistance and Fatigue Behaviour of Ti-6Al-4V Notched Members Coated with Hydroxyapatite Coatings

机译：羟基磷灰石涂层Ti-6Al-4V缺口件的耐磨性和疲劳行为研究

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摘要

In this study, surface properties of Ti-6Al-4V alloy coated with hydroxyapatite coatings were investigated. Wear resistance and fatigue behaviour of samples with coating thicknesses of 10 and 50 µm as well as uncoated samples were examined. Wear experiments demonstrated that the friction factor of the uncoated titanium decreased from 0.31 to 0.06, through a fluctuating trend, after 50 cycles of wear tests. However, the friction factor of both the coated samples (10 and 50 µm) gradually decreased from 0.20 to 0.12 after 50 cycles. At the end of the 50th cycle, the penetration depth of the 10 and 50 µm coated samples were 7.69 and 6.06 µm, respectively. Fatigue tests showed that hydroxyapatite coatings could improve fatigue life of a notched Ti-6Al-4V member in both low and high cycle fatigue zones. It was understood, from fractography of the fracture surfaces, that the fatigue zone of the uncoated specimens was generally smaller in comparison with that of the coated specimens. No significant difference was observed between the fatigue life of coated specimens with 10 and 50 µm thicknesses.
机译：在这项研究中，研究了涂覆有羟基磷灰石涂层的Ti-6Al-4V合金的表面性能。检查了涂层厚度为10和50 µm的样品以及未涂层样品的耐磨性和疲劳性能。磨损实验表明，经过50次磨损测试后，未涂层钛的摩擦系数通过波动趋势从0.31降低至0.06。但是，两个涂层样品（10和50 µm）的摩擦系数在经过50个循环后从0.20逐渐降低到0.12。在第50个循环结束时，10和50 µm涂层样品的渗透深度分别为7.69和6.06 µm。疲劳试验表明，羟基磷灰石涂层可以改善低周期和高周期疲劳区带缺口Ti-6Al-4V构件的疲劳寿命。从断裂表面的断层图可以理解，未涂覆样品的疲劳区域通常比涂覆样品的疲劳区域小。在厚度为10和50 µm的涂层试样的疲劳寿命之间没有观察到显着差异。

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