The influence of abrasive body dimensions on single asperity wear
The influence of abrasive body dimensions on single asperity wear
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DOI：
10.1016/j.wear.2012.12.009
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发表时间：
2013-04
期刊：
影响因子：
5
通讯作者：
M. Woldman;E. Heide;T. Tinga;M. Masen
中科院分区：
文献类型：
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作者：
M. Woldman;E. Heide;T. Tinga;M. Masen
本文主要研究了磨料体的性能与其引起的磨损之间的关系。通过进行单一粗糙度划痕测试来模拟磨料磨损，磨损过程在受控环境中进行，从而可以隔离和独立研究磨料体的特性。所使用的设置是一个针对平机器，使刮擦沿直线和主动负载控制。通过使用单晶sio2尖对DIN St-52钢试样进行刮擦，得到了磨料体。通过改变磨粒尖半径，研究磨粒体尺寸对磨粒磨损过程的影响。法向载荷也进行了变化，以获得其影响。使用共聚焦显微镜，对划痕进行分析，以确定磨损机制，如犁耕和切割，并确定体积磨损。结果表明，磨损量随载荷的增加而增加。更有趣的是，磨损率随磨料尺寸的变化而显著变化，从而可以根据磨料体尺寸预测磨损率。观察到，与先前报道的尺寸效应相反，较小的尖端比较大的尖端造成更多的磨损。此外，在本工作中研究的低渗透程度下，基于观察到磨损程度随渗透程度的增加而降低，确定了有限塑性变形的制度。
This work focuses on the relation between the properties of abrasive bodies and the wear they cause. By performing single asperity scratch tests to simulate abrasive wear, the wear process takes place in a controlled environment, allowing the properties of the abrasive body to be isolated and studied independently. The setup used is a pin-on-flat machine, enabling scratching along a straight line and under active load control. The abrasive bodies were generalised by using single crystal SiO2tips to scratch DIN St-52 steel samples. The tip radius was varied to study the influence of the abrasive body size on the abrasive wear process. The normal load was varied as well to obtain its influence. Using confocal microscopy, the scratches were analysed to identify the abrasion mechanisms, such as ploughing and cutting and to determine the volumetric wear. As expected, the results show an expected increase in the wear volume with increasing load. More interestingly, the wear rate varies significantly as a function of the size of the abrasive, enabling the prediction of the wear rate based on the abrasive body size. It is observed that, contrary to earlier reported size effects, smaller tips cause more wear than larger tips do. Moreover, at the low values for the degree of penetration studied in this work, a regime of limited plastic deformation was identified, based on the observation that the degree of wear parameter decreases with increasing degree of penetration.