Measurements of Adhesion Force of Sliding materials under Engineering Conditions And Its Application

本研究在工程条件下，包括润滑条件下，测量了几种滑动材料与尖角金刚石压头的粘附力。此外，作为测量的应用，还研究了摩擦系数μ与附着力之间的关系以及μ与压痕投影面积之间的关系。结果表明，静摩擦系数可以通过压痕结果来估算。得到的结论如下：1)压头角度对粘附力影响很大，压头越尖，粘附力越大。在压头夹角不变的情况下，附着力几乎与施加的载荷成正比。2)不同的配对材料，附着力是不同的。特别是，钛合金产生的粘附力比其他金属的粘附力大。3)在Lub…下，粘附力是相同数量级的更不含富集物的条件下和润滑。另一方面，在有润滑剂的情况下，微动损伤的表面的粘附力较低。4)在压头尖端较尖锐的角度产生较大的粘附力是由于(A)在压头尖端较尖锐的角度发展更强烈的塑性流动而发生更紧密的粘合，以及(B)由于卸载时弹性恢复的程度较小而阻碍了粘合材料的断裂。5)如果用表示材料软化的参数来调整不同材料的粘合系数，则它们之间显示出较好的相关性7)作用在压头侧面的法向压力几乎不受它们之间的摩擦系数的影响。8)粘着系数与测量的静摩擦系数有很好的相关性。较少

In this research, the measurements of adhesion force between several sliding materials and sharp angled diamond indenters are made under the engineering conditions, including a lubricated condition. In addition as an application of the measurements the relation between the coefficient of friction μ and the adhesion force, as well as the relation between μ and the the projected area of indentation are examined. Based on the results it is shown that the static coefficient of friction can be estimated by the indentation result. The conclusions obtained are as follows.1)The adhesive force is strongly affected by the angle of the indenter tip and grows larger at sharper indenter tips. The adhesive force is almost proportional to applied load at a constant angle of the indenter tip.2)The adhesive force is different for different counterpart materials. In particular, titanium alloy generates an adhesive force larger than that of other metals.3)The adhesive force is of the same order under lub … More ricant-free conditions and under lubrication. On the other hand, the adhesive force of the surface damaged by the fretting is lower in the presence of a lubricant.4)The generation of a larger adhesive force at sharper angles of the indenter tip is due to (a) the occurrence of a tighter adhesion by the development of more intensive plastic flows at sharper angles of the indenter tips and (b) the obstruction of the breakage of adhered material because of a smaller extent of the elastic recovery during unloading.5)The coefficient of adhesion of different materials shows a comparatively good correlation between them if adjusted by a parameter expressing the softening of material.6)The estimated coefficient of friction which is derived based on the projected area of indentation is almost equal to that obtained by the friction measurement.7)The normal pressure acting on the side of indenter is hardly affected by the coefficient of friction between them.8)The adhesive coefficient is of good correlation with the static coefficient of friction measured. Less