Lubricated fretting tests in mineral oil were performed with a nanocrystalline surface layer on a pure bulk Cu prepared by surface mechanical attrition treatment (SMAT) against a WC-Co ball. It was found that the nanocrystalline surface layer exhibited a markedly enhanced fretting wear resistance and higher friction coefficient relative to the coarse-grained (CG) form. The wear volume of the SMAT Cu is one order of magnitude lower than that of the CG Cu. The friction coefficient of the SMAT Cu increases with an increasing load and frequency, while for the CG Cu, the friction coefficient increases with an increasing fretting frequency up to 100 Hz and thereafter decreases. The higher hardness of the SMAT Cu is suggested to be the main factor causing its improved wear resistance and higher friction coefficient. A discontinuous metal transfer layer can be found on the WC-Co ball only after fretting against the SMAT Cu, which may partly account for the higher wear resistance of the SMAT Cu in comparison with the CG Cu.
部门归属
chinese acad sci, met res inst, shenyang natl lab mat sci, shenyang 110016, peoples r china.;han, z (reprint author), chinese acad sci, met res inst, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china;zhonghan@imr.ac.cn
Y. S. Zhang,Z. Han. Fretting wear behavior of nanocrystalline surface layer of pure copper under oil lubrication[J]. Tribology Letters,2007,27(1):53-59.
APA
Y. S. Zhang,&Z. Han.(2007).Fretting wear behavior of nanocrystalline surface layer of pure copper under oil lubrication.Tribology Letters,27(1),53-59.
MLA
Y. S. Zhang,et al."Fretting wear behavior of nanocrystalline surface layer of pure copper under oil lubrication".Tribology Letters 27.1(2007):53-59.
修改评论