Effects of ultrasonic nanocrystalline surface modification on the tribological properties of AZ91D magnesium alloy
Effects of ultrasonic nanocrystalline surface modification on the tribological properties of AZ91D magnesium alloy
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DOI：
10.1016/j.triboint.2012.04.024
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发表时间：
2012-10-01
影响因子：
6.2
通讯作者：
Kim, Dae-Eun
中科院分区：
文献类型：
--
作者：
Amanov, Auezhan;Penkov, Oleksiy V.;Kim, Dae-Eun
利用超声纳米晶表面改性技术在AZ91D镁合金表面制备了厚度约100 μ m的纳米晶表面层。研究了超声乳化处理对AZ91D镁合金圆盘试样与氮化硅陶瓷球组合摩擦学性能的影响。在本研究中，UNSM处理的磁盘试样进行不同的冲击载荷与不同的纳米晶表面层深度进行了研究。电子背散射衍射（EBSD）的观察表明，在顶表面层的晶粒尺寸减小到几个纳米后UNSM处理。UNSM处理的试样表现出更好的摩擦学性能代表约23%的摩擦减少和约30%的磨损率相比，未经处理的试样。(C)2012爱思唯尔有限公司保留所有权利。
A nanocrystalline surface layer of about 100 mu m thickness was generated on AZ91D Mg alloy using the ultrasonic nanocrystalline surface modification (UNSM) technique. Experiments were performed to study the effects of UNSM treatment on the tribological properties of AZ91D Mg alloy disk specimen and silicon nitride ceramic (Si3N4) ball combination. In the present study, UNSM-treated disk specimens with different nanocrystalline surface layer depths subjected to different impact loads were investigated. Electron backscatter diffraction (EBSD) observations revealed that the grain size at the top surface layer was decreased down to a few nanometers after UNSM treatment. The UNSM-treated specimens showed better tribological properties representing about 23% reduction in friction and about 30% in wear rate compared to that of the untreated specimens. (C) 2012 Elsevier Ltd. All rights reserved.