A study of the reciprocating-sliding wear performance of plasma surface treated titanium alloy
A study of the reciprocating-sliding wear performance of plasma surface treated titanium alloy
复制标题
DOI：
10.1016/j.wear.2010.03.008
复制
发表时间：
2010-05-20
期刊：
影响因子：
5
通讯作者：
Leyland, A.
中科院分区：
文献类型：
--
作者：
Cassar, G.;Wilson, J. C. Avelar-Batista;Leyland, A.
为了提高Ti-6Al-4V钛合金的耐磨性，采用三极等离子体渗氮结合电子束等离子体辅助物理气相沉积TiN和CrAlN的方法。进行了直线往复滑动球-板磨损试验，以评估处理后的合金的摩擦学性能。磨损量与摩擦系数的变化相关，摩擦系数通常指示表面处理的故障。磨损试验过程中产生的碎片，其特征在于使用扫描电子显微镜（SEM），能量色散X射线光谱（EDX），X射线衍射（XRD）和激光衍射粒度分析。采用表面显微轮廓术和扫描电镜对磨痕进行了表征。所获得的结果表明，为了评估通过使用表面处理获得的磨损性能的相对改善，单独比较线性磨损率是不够的。只有在增加滑动距离的步骤中进行测试，直到处理/沉积层被完全去除，才有可能进行清晰的比较。此外，它表明，需要明确评估的处理和/或涂层的重复测试的数量可以有很大的变化，这取决于观察到的测试进展;通常这需要最大数量的重复磨损点周围的球配合面接触面积是在从处理层（S）过渡到基板散装。线性球板往复滑动下的磨损性能的固有变异性与碎片的产生，相对湿度的变化-以及由此产生的磨损机制有关。(C)2010爱思唯尔有限公司版权所有。
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. (C) 2010 Elsevier B.V. All rights reserved.