| 水介质条件下7075合金扭转复合微动磨损特性研究 |
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| 引用本文： | 沈明学,蔡振兵,周琰,彭旭东,朱旻昊. 水介质条件下7075合金扭转复合微动磨损特性研究[J]. 摩擦学学报, 2013, 33(6): 594-599 |
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| 作者姓名： | 沈明学 蔡振兵 周琰 彭旭东 朱旻昊 |
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| 作者单位： | 1. 浙江工业大学 过程装备及其再制造教育部工程研究中心, 杭州 310032;2. 西南交通大学 牵引动力国家重点实验室 摩擦学研究所, 成都 610031;西南交通大学 牵引动力国家重点实验室 摩擦学研究所, 成都 610031;西南交通大学 牵引动力国家重点实验室 摩擦学研究所, 成都 610031;浙江工业大学 过程装备及其再制造教育部工程研究中心, 杭州 310032;西南交通大学 牵引动力国家重点实验室 摩擦学研究所, 成都 610031 |
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| 基金项目： | 国家杰出青年科学基金（51025519）；国家自然科学基金（51005192）和教育部创新研究团队项目（IRT1178）资助. |
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| 摘 要： | 在新型扭转复合微动试验机上，以7075合金平面/GCr15钢球配副为研究对象，研究水介质对7075合金扭转复合微动磨损行为的影响.在微动动力学特性分析的基础上结合磨痕形貌微观分析，研究水介质环境下7075合金扭转复合微动的磨损机理.结果表明：水介质对扭转复合微动运行和损伤机制存在显著影响，水介质明显地改变了微动运行区域；相比干态，在部分滑移区和混合区，水介质下的剥层现象更加明显，水介质加速了微动损伤.在滑移区，磨损机制主要转变为以磨粒磨损为主，湿润的磨屑能有效降低表面摩擦系数和减缓微动损伤；而单一的水介质会加剧材料的磨损.此外，水介质和干态微动环境中不同倾斜角度下的磨损体积均与累积耗散能分别呈不同的线性关系.
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| 关 键 词： | 微动磨损 扭转复合微动 水介质 7075合金 |
| 修稿时间： | 2013-05-02 |
Dual-rotary Fretting Wear Characteristic of 7075 Alloy in Water |
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| SHEN Ming-xue,CAI Zhen-bing,ZHOU Yan,PENG Xu-dong and ZHU Min-hao. Dual-rotary Fretting Wear Characteristic of 7075 Alloy in Water[J]. Tribology, 2013, 33(6): 594-599 |
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| Authors: | SHEN Ming-xue CAI Zhen-bing ZHOU Yan PENG Xu-dong ZHU Min-hao |
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| Affiliation: | 1. Engineering Research Center of Process Equipment and Its Remanufacture, Ministry of Education, Zhejiang University of Technology, Hangzhou 310032, China;2. Tribology Research Institute, Traction Power State Key Laboratory, Southwest Jiaotong University, Chengdu 610031, China;Tribology Research Institute, Traction Power State Key Laboratory, Southwest Jiaotong University, Chengdu 610031, China;Tribology Research Institute, Traction Power State Key Laboratory, Southwest Jiaotong University, Chengdu 610031, China;Engineering Research Center of Process Equipment and Its Remanufacture, Ministry of Education, Zhejiang University of Technology, Hangzhou 310032, China;Tribology Research Institute, Traction Power State Key Laboratory, Southwest Jiaotong University, Chengdu 610031, China |
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| Abstract: | The 7075 aluminum alloy flat against GCr15 steel ball were chosen as friction pair. The effect of water medium on the dual-rotary fretting (DRF) wear behavior of 7075 aluminum alloy has been investigated by using an advanced dual-rotary fretting rig. Base on the analysis of the frictional kinetics and the observation of wear morphologies, the damage characteristics of 7075 aluminum alloy in water medium were discussed in detail. The results indicate that the water medium had significant effects on the fretting running characteristics and the damage mechanism. The delamination phenomenon under water medium were more obviously in the partial slip regime and the mixed fretting regime than that of dry condition, and the fretting damage was accelerated in water medium. In slip regime, the main wear mechanisms were gradually changed into abrasive wear, a mixture of the debris and water can more effectively reduce the friction coefficient and mitigate the fretting damage than pure water. In addition, two linear relationship between accumulated dissipated energy and angular displacement amplitudes can be found in water medium and dry condition. |
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| Keywords: | fretting wear dual-rotary fretting water media 7075 alloy |
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