The performance of polymer-based and phosphorus-based cutting fluid additives have been shown to depend on the machining conditions employed. This study investigated the tribological behaviour behind the previously reported machining performance of polymer-based and phosphorus-based additives on Ti-6Al-4V using ball-on-disc tests. The coefficient of friction (COF) was evaluated using ball-on-disc tests, surface characterisation was performed on the Ti-6Al-4V and steel ball counterfaces to investigate the wear and friction reduction mechanisms. The tribological performance of the phosphorus-based additive was observed to be influenced by the applied load and temperature. The activation of this additive resulted in a reduction in COF at elevated temperatures. However, the activation temperature was observed to be influenced by the applied load. The COF associated with the polymer-based additive was noted to increase as the temperature increased, regardless of the applied load. The formation of tribolayers from the additives was related to the COF behaviour as well as the surface damage on Ti-6Al-4V and lower material transfer to the steel counterfaces.

中文翻译：

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Ti-6Al-4V合金切削液添加剂的摩擦学行为研究

聚合物基和磷基切削液添加剂的性能已被证明取决于所采用的加工条件。本研究使用球盘试验调查了先前报道的聚合物基和磷基添加剂在 Ti-6Al-4V 上的加工性能背后的摩擦学行为。使用圆盘试验评估摩擦系数 (COF)，对 Ti-6Al-4V 和钢球配合面进行表面表征，以研究磨损和减摩机制。观察到磷基添加剂的摩擦学性能受外加载荷和温度的影响。这种添加剂的活化导致高温下 COF 的降低。然而，观察到活化温度受施加负载的影响。注意到与聚合物基添加剂相关的 COF 随着温度升高而增加，而与施加的负载无关。添加剂形成的摩擦层与 COF 行为以及 Ti-6Al-4V 的表面损伤和较低的材料向钢配合面的转移有关。