| 重冲击载荷作用下硬铝合金的损伤行为研究 |
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| 引用本文： | 石成霞,王静,陈凡秀,李宏升.重冲击载荷作用下硬铝合金的损伤行为研究[J].润滑与密封,2011,36(2). |
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| 作者姓名： | 石成霞 王静 陈凡秀 李宏升 |
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| 作者单位： | 1. 青岛理工大学机械工程学院,山东青岛,266033
2. 青岛理工大学理学院,山东青岛,266033 |
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| 基金项目： | 国家自然科学基金项目(50705045); 教育部留学归国人员科研启动基金项目([2008]890) |
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| 摘 要： | 在自制的冲击实验台上,以一定频率使钢球往复冲击硬铝试件盘,研究硬铝合金在干接触及两种不同黏度的润滑油润滑条件下,随冲击载荷大小及冲击次数变化的表面变形现象。结果表明:冲击时,由于凹坑中心产生的热量不断向边缘传递,使凹坑边缘形成凸起即形成所谓彩虹环;彩虹环高度随润滑油黏度的增加及载荷的增加而增加;润滑油的使用可以降低材料表面的塑性变形和磨损;对于干接触条件,凹坑内部发生微细颗粒碎化,而油润滑时凹坑内部出现微裂纹;微细颗粒碎化及微裂纹的程度均随冲击次数和载荷的增加而增加。
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| 关 键 词： | 塑性变形 凹坑 铝合金 磨损 彩虹环 |
Wear of Duralumin under Heavy Impact Load |
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| Shi Chengxia,Wang Jing,Chen Fanxiu,Li Hongsheng.Wear of Duralumin under Heavy Impact Load[J].Lubrication Engineering,2011,36(2). |
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| Authors: | Shi Chengxia Wang Jing Chen Fanxiu Li Hongsheng |
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| Affiliation: | Shi Chengxia1 Wang Jing1 Chen Fanxiu2 Li Hongsheng2(1.School of Mechanical Engineering,Qingdao Technological University,Qingdao Shandong 266033,China,2.Faculty of Science,China) |
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| Abstract: | On a self-made test bed,a duralumin plate was impacted by a steel ball under control of a electromagnet.With the changes of the impacting load and the impacting times,the surface deformation of the plate was explored under dry and lubricated contacts.The results show that the raised shoulder of the dent,i.e.,the so-called iridescent ring,is formed because the heat produced during the impact transfers to the vicinity.The iridescent ring is augmented with the increase of the load and the viscosity of the lubr... |
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| Keywords: | plastic deformation pit aluminium alloy wear iridescent ring |
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