吴灿,孙虎儿,杨超毅.FeCr合金波纹形貌对滚滑摩擦性能影响的原子分析[J].精密成形工程,2024,16(8):165-172.
WU Can,SUN Huer,YANG Chaoyi.Atomic Analysis of the Effect of Wavy Morphology on the Rolling-sliding Frictional Properties of FeCr Alloys[J].Journal of Netshape Forming Engineering,2024,16(8):165-172. |
| FeCr合金波纹形貌对滚滑摩擦性能影响的原子分析 |
| Atomic Analysis of the Effect of Wavy Morphology on the Rolling-sliding Frictional Properties of FeCr Alloys |
| 投稿时间：2024-01-11 |
| DOI：10.3969/j.issn.1674-6457.2024.08.019 |
| 中文关键词: 正弦表面 纳米压痕 滚滑摩擦磨损 接触 分子动力学 |
| 英文关键词: sinusoidal surface nanoindentation rolling-sliding friction wear contact molecular dynamics |
| 基金项目:山西省基础研究计划(202103021223196) |
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| 摘要点击次数: 210 |
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| 中文摘要: |
| 目的 研究FeCr合金不同表面波纹形貌对滚滑摩擦力学特性的影响，旨在指导高精密零件表面加工。方法 采用分子动力学方法构建了光滑表面、一维和二维正弦波纹表面。综合分析了不同形貌特征对纳米压痕和滚滑摩擦过程中FeCr合金的变形、亚表面损伤以及摩擦性能的影响。结果 在纳米压痕试验中，光滑表面接触面积最大，受压后变形最大，且压痕力与接触面积呈正相关。不同表面形貌的塑性变形临界压深存在显著差异，其中二维正弦波纹表面的临界压深最大。在纳米滚滑摩擦试验中，原子相互作用占主导作用，在3种表面中，光滑表面摩擦力和摩擦因数最高。在纯滑动或高速滚动时，一维正弦波纹表面的摩擦因数最小。此外，在摩擦试验中，磨损原子堆积高度、分布与界面形貌特征、滚动速度相关。磨屑原子堆积的体积和高度与接触面积呈正相关，与滚动速度呈负相关。二维正弦波纹表面磨屑原子堆积高度最低，亚表面最为稳定。结论 波纹形貌表面能够减小实际接触面积，密集的波峰和波谷能够减小材料的变形，提高亚表面稳定性。 |
| 英文摘要: |
| The work aims to investigate the effect of different surface wavy morphologies on the rolling-sliding frictional mechanical properties of FeCr alloys, so as to guide the surface processing of high-precision components. The molecular dynamics was used to construct smooth surfaces and one-dimensional and two-dimensional sinusoidal wavy surfaces. Comprehensive analysis was conducted on the impact of various morphological characteristics on the deformation, subsurface damage, and frictional properties of FeCr alloy during nanoindentation and rolling-sliding friction. In nanoindentation experiments, the smooth surface had the largest contact area and underwent the greatest deformation after compression, and the indentation force was directly proportional to the contact area. Significant differences existed in the critical indentation depth for plastic deformation across different surface morphologies, with the two-dimensional sinusoidal wavy surface having the largest critical depth. In the nano rolling-sliding friction experiments, atomic interaction played a dominant role, and among the three surfaces, the smooth surface exhibited the highest friction force and friction coefficient. During pure sliding or high-speed rolling, the one-dimensional sinusoidal wavy surface had the lowest friction coefficient. Additionally, in the friction experiments, the accumulation height and distribution of worn atoms were related to the interface morphology characteristics and rolling speed. The volume and height of accumulated worn atoms were positively correlated with the contact area and negatively correlated with the rolling speed. The two-dimensional sinusoidal wavy surface had the lowest accumulation height of worn atoms, indicating the most stable subsurface. Wavy surface morphologies are capable of reducing the actual contact area, and the dense arrangement of wave peaks and valleys can decrease material deformation, thereby enhancing subsurface stability. |
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