Laser Induced Rectangular Microstructures for Surface of Cavitation Erosion Resistance

被引:4
作者
Yang, Haifeng [1 ,2 ]
Sun, Bo [1 ]
Liu, Hao [1 ]
Wang, Yanqing [3 ]
Liu, Kun [1 ]
Tian, Xianhua [1 ]
机构
[1] China Univ Min & Technol, Sch Mechatron Engn, Xuzhou 221116, Peoples R China
[2] China Univ Min & Technol, Jiangsu Key Lab Mine Mech & Elect Equipment, Xuzhou 221116, Peoples R China
[3] Xuzhou Inst Technol, Sch Mat Sci & Engn, Xuzhou 221116, Peoples R China
来源
JOURNAL OF LASER MICRO NANOENGINEERING | 2017年 / 12卷 / 02期
关键词
cavitation erosion resistance; ultrasonic cavitation; laser; rectangular microstructure; numerical simulation; ALLOY; WATER;
D O I
10.2961/jlmn.2017.02.0017
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
In the design of hydraulic machines, the application of surface treatments is essential to improve the cavitation erosion resistance of components. In this paper, the cavitation erosion behavior of rectangular microstructure surfaces was studied. Before cavitation erosion experiments, the surface of 1060 high purity aluminum plate was processed by laser microfabrication method to generate rectangular microstructures with special groove depth, groove width and different periods. The cavitation tests were carried out using a commercially available ultrasonic vibratory apparatus. Before and after the cavitation erosion experiments, specimens with rectangular microstructures were measured for calculating the average cavitation erosion losses with analytical balances, analyzed for exploring cavitation erosion mechanisms using numerical simulation, scanning electron microscopy and optical microscopy. The results showed that rectangular microstructure surfaces, compared to the smooth surfaces, have better cavitation erosion performance, and its period, as an important parameter of the microstructure configuration, was a factor affecting cavitation erosion resistance. The cavitation erosion resistance mechanisms of rectangular microstructure surfaces were lower vapor volume fraction and smaller pressure fluctuation, which will not lead to the contraction and collapse of the bubbles.
引用
收藏
页码:146 / 152
页数:7
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