IMR OpenIR
Dry sliding tribological properties and subsurface structure of nanostructured copper at liquid nitrogen temperature
B. Yao; Z. Han; K. Lu
2013
Source PublicationWear
ISSN0043-1648
Volume301Issue:1-2Pages:608-614
AbstractBulk nanostructured Cu sample with nano-scale twin bundles embedded in nano-sized grains was synthesized by using dynamic plastic deformation (DPD) technique. Dry sliding tribological properties of the DPD Cu and the coarse grained (CG) Cu samples were investigated under liquid nitrogen temperature (LNT) in comparison with room temperature (RT) conditions. Experimental results show that the wear volume under LNT was much larger than that under RT for both sets of Cu samples. The DPD Cu sample exhibits almost same wear volume compared with the CG Cu when sliding at LNT, which is quite different from the enhanced wear resistance for the DPD Cu sample sliding at RT. A similar steady worn subsurface structure was formed for two Cu samples, which was constituted by heavily deformed nanostructured mixing layer (NML) and ultra-fine grained dynamic recrystallization (DRX) layer. Comparing with the worn subsurface structure at RT, lower sliding temperature could effectively suppress grain growth within the DRX layer, resulting in a cracked NML and extremely fine grains in the DRX layer. When sliding at LNT, quick propagation of cracks from NML into DRX layer and flaking rate of NML are determining the wear process which results in a high wear rate. (C) 2012 Elsevier B.V. All rights reserved.
description.department[yao, b. ; han, z. ; lu, k.] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. ; han, z (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china. ; zhonghan@imr.ac.cn
KeywordSliding Wear Copper Nanostructured Metals Electron Microscopy Liquid Nitrogen Temperature Dynamic Plastic-deformation Thermal-stability Nanocrystalline Nickel Grain-size Microstructural Evolution Wear-resistance Behavior Metals Friction Coatings
URL查看原文
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/71646
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
B. Yao,Z. Han,K. Lu. Dry sliding tribological properties and subsurface structure of nanostructured copper at liquid nitrogen temperature[J]. Wear,2013,301(1-2):608-614.
APA B. Yao,Z. Han,&K. Lu.(2013).Dry sliding tribological properties and subsurface structure of nanostructured copper at liquid nitrogen temperature.Wear,301(1-2),608-614.
MLA B. Yao,et al."Dry sliding tribological properties and subsurface structure of nanostructured copper at liquid nitrogen temperature".Wear 301.1-2(2013):608-614.
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