Abstract In this paper, electrically-assisted (EA) micro-ring compression tests were carried out to investigate the tribological behavior. It was found that the lubricity of conductive greases was outstanding in the moderate current density range, in which the ablation and oxidation induced by current were almost suppressed. Moreover, the presence of current would reduce the frictional size effects, and this trend increased with the increase of current density. It was attributed to the affects of the joule heating effect induced by current. Finally, a new friction model was put forward to quantify the influence of specimen scale and current by introducing the scale factor and current density, which could effectively predict the friction coefficient and explain the mechanism of friction size effects.

中文翻译：

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试样尺寸和电流密度对TC4钛合金电辅助微成形摩擦学行为的交互作用

摘要 在本文中，进行了电辅助（EA）微环压缩试验以研究摩擦学行为。结果表明，在中等电流密度范围内，导电润滑脂的润滑性突出，电流引起的烧蚀和氧化几乎得到抑制。此外，电流的存在会降低摩擦尺寸效应，这种趋势随着电流密度的增加而增加。这归因于电流引起的焦耳热效应的影响。最后，通过引入比例因子和电流密度，提出了一种新的摩擦模型来量化试样尺度和电流的影响，可以有效地预测摩擦系数并解释摩擦尺寸效应的机理。