Abstract This study investigated the relationship between the chemical reaction film formation derived from engine oil additives and crystal grain structure of a steel surface. Variations in the contact area between a rotating sapphire disc and a stationary steel pin were captured by a monochromatic high-speed camera. A fully formulated low viscosity engine oil was used as the lubricant. After friction tests, the elements on the surface were analysed using energy dispersive X-ray spectroscopy and the crystal grain structure of the top surface layer by electron backscatter diffraction. In-situ and ex-situ analyses revealed that plastic flow changed the crystal grain structure of the surface, inhibiting the formation of the chemical reaction film derived from additives.

中文翻译：

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钢表面晶粒结构对机油添加剂化学反应膜形成的影响

摘要 本研究研究了发动机油添加剂产生的化学反应膜形成与钢表面晶粒结构之间的关系。旋转的蓝宝石圆盘和固定的钢针之间的接触面积的变化是由单色高速相机捕捉到的。使用完全配制的低粘度发动机油作为润滑剂。摩擦测试后，使用能量色散 X 射线光谱分析表面元素，并通过电子背散射衍射分析顶面层的晶粒结构。原位和非原位分析表明，塑性流动改变了表面的晶粒结构，抑制了由添加剂衍生的化学反应膜的形成。