Wu Wei, Chen Guiming, Fan Boxuan, Liu Jianyou
Xi'an Res Inst Hi-tech, Xi'an, China.
The Fourth Academy of CASC, Xi'an, China.
PLoS One. 2016 Apr 1;11(4):e0152100. doi: 10.1371/journal.pone.0152100. eCollection 2016.
Energy consumption and tribological properties could be improved by proper design of surface texture in friction. However, some literature focused on investigating their performance under high temperature. In the study, different groove surface textures were fabricated on steels by a laser machine, and their tribological behaviors were experimentally studied with the employment of the friction and wear tester under distinct high temperature and other working conditions. The friction coefficient was recorded, and wear performance were characterized by double light interference microscope, scanning electron microscope (SEM) and x-ray energy dispersive spectrometry (EDS). Then, the performances of energy consumptions were carefully estimated. Results showed that friction coefficient, wear, and energy consumption could almost all be reduced by most textures under high temperature conditions, but to a different extent which depends on the experimental conditions and texture parameters. The main improvement mechanisms were analyzed, such as the hardness change, wear debris storage, thermal stress release and friction induced temperature reduction by the textures. Finally, a scattergram of the relatively reduced ratio of the energy consumption was drawn for different surface textures under four distinctive experimental conditions to illustrate the comprehensive energy consumption improving ability of textures, which was of benefit for the application of texture design.
通过在摩擦中对表面纹理进行合理设计，可以改善能量消耗和摩擦学性能。然而，一些文献聚焦于研究它们在高温下的性能。在本研究中，通过激光加工在钢上制备了不同的沟槽表面纹理，并利用摩擦磨损试验机在不同高温及其他工作条件下对其摩擦学行为进行了实验研究。记录了摩擦系数，并通过双光干涉显微镜、扫描电子显微镜（SEM）和X射线能谱仪（EDS）对磨损性能进行了表征。然后，仔细评估了能量消耗性能。结果表明，在高温条件下，大多数纹理几乎都能降低摩擦系数、磨损和能量消耗，但降低程度不同，这取决于实验条件和纹理参数。分析了主要的改善机制，如硬度变化、磨损碎屑储存、热应力释放以及纹理导致的摩擦诱导温度降低。最后，绘制了在四种不同实验条件下不同表面纹理的能量消耗相对降低率的散点图，以说明纹理的综合能量消耗改善能力，这有利于纹理设计的应用。
