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首页> 外文期刊>Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear >A study of the reciprocating-sliding wear performance of plasma surface treated titanium alloy
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A study of the reciprocating-sliding wear performance of plasma surface treated titanium alloy

机译：等离子表面处理钛合金往复滑动磨损性能的研究

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Triode plasma nitriding was used in conjunction with electron-beam plasma-assisted physical vapour deposition of TiN and CrAlN to enhance the wear resistance of Ti-6Al-4V titanium alloy. Linear reciprocating-sliding ball-on-plate wear tests were performed to assess the tribological performance of the treated alloy. Wear volumes were correlated to changes in coefficient of friction, which is often indicative of breakdown of the surface treatment. Debris generated during wear testing was characterised using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD) and laser diffraction for particle size analysis. Surface micro-profilometry and SEM were used to characterise the wear scars. The results obtained indicate that, in order to assess the relative improvement in wear behaviour attained by using surface treatments it is insufficient to compare linear wear rates alone. A clear comparison is only possible if testing is carried out in steps of increasing sliding distance, until the treated/deposited layers have been completely removed. Also, it is shown that the number of repeated tests necessary to evaluate clearly the treatment and/or coating can vary substantially, depending on the observed test progression; typically this necessitates the greatest number of repeats around the point of wear at which the ball counterface contact area is in transition from the treatment layer(s) to the substrate bulk. The inherent variability in wear performance under linear ballon-plate reciprocating-sliding is correlated to debris generation, changes in relative humidity - and the resultant wear mechanisms involved.
机译：三极管等离子体氮化与TiN和CrAlN的电子束等离子体辅助物理气相沉积结合使用，可增强Ti-6Al-4V钛合金的耐磨性。进行了线性往复滑动板对球磨损试验，以评估处理后合金的摩擦学性能。磨损量与摩擦系数的变化相关，而摩擦系数的变化通常表明表面处理的失败。使用扫描电子显微镜（SEM），能量色散X射线光谱仪（EDX），X射线衍射（XRD）和激光衍射来表征磨损测试过程中产生的碎屑，以进行粒度分析。使用表面微轮廓仪和SEM表征磨损痕迹。获得的结果表明，为了评估使用表面处理所获得的磨损行为的相对改善，不足以单独比较线性磨损率。只有在增加滑动距离的步骤中进行测试，直到已完全去除已处理/沉积的层之前，才能进行明确的比较。另外，还表明，根据观察到的测试进程，清楚评估处理和/或涂层所需的重复测试次数可能会有很大变化。通常，这需要在磨损点周围进行最大数量的重复，在该磨损点处，球对立面接触区域从处理层过渡到基材块。线性气球板往复滑动下的磨损性能的内在变化与碎屑的产生，相对湿度的变化以及由此产生的磨损机理有关。

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