Micro-dimple and micro-bulge textures:Influence of surface topography types on stick–slip behavior under starved lubrication

酒窝 打滑(空气动力学) 材料科学 润滑 隆起 复合材料 摩擦学 摩擦学 光学 天文 热力学 物理 星星
作者
Yuyang He,Jie Yang,Hao Wang,Zehui Gu,Yonghong Fu
出处
期刊:Applied Surface Science [Elsevier BV]
卷期号:585: 152501-152501 被引量:18
标识
DOI:10.1016/j.apsusc.2022.152501
摘要

• Adopting micro-bulge textures to inhibit stick–slip behavior. • Investing stick–slip behavior in the sight of motion, friction, and wear. • Comparison of anti-stick–slip effect between micro-dimple and micro-bulge textures. • Micro-bulge textures exhibit better anti-stick–slip effect compared with others. Stick-slip behavior, a common problem of contact under severe lubrication, is closely related with surface topography. To investigate the influence of surface topography types on stick–slip behavior, micro-dimple and micro-bulge textures, typical concave and convex topographies, were fabricated by pulse picosecond laser and CW fiber, respectively. A gyroscope sensor was mounted on the pin-on-disc modular of multifunctional tribometer to conduct friction dynamics tests. The intensity of stick–slip behavior is characterized by the amplitude and duration of stick–slip behavior. The results show that, under the same starved lubrication, the micro-bulge textured disc showed the lowest intensity while the untextured one showed the highest intensity. In comparison with micro-dimple and micro-bulge textured disc exhibits higher efficiency in inhibiting stick–slip behavior as well as starting stable sliding. The mechanism of inhibiting stick–slip behavior for micro-dimple textures is generated by trapping wear debris and forming effective oil film. However, the cause of micro-bulge textures is the reduced contact area, which result in the reduction of the propensity of secondary plateaus, plastic flow, and adhesive junctions between asperities.
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