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	Nanoindentation investigation of the mechanical behaviors of nanoscale Ag/Cu multilayers
	Wen, S. P. ; Zong, R. L. ; Zeng, F. ; Gao, Y. ; Pan, F.
	2010-05-10 ; 2010-05-10
关键词	NANOCRYSTALLINE MATERIALS PLASTIC-DEFORMATION ELASTIC-MODULUS THIN-FILM INDENTATION METALS HARDNESS MICROINDENTATION CONSTANTS SUBSTRATE Materials Science, Multidisciplinary
中文摘要	The microstructure, hardness, elastic modulus, and indentation creep of Ag/Cu multilayers prepared by magnetron sputtering were investigated by x-ray diffraction, transmission electron microscopy, and nanoindentation. The hardness values obey the Hall-Petch relationship as the periodicity decreases to 20 nm. For multilayers with periodicity smaller than 20 nm, the Hall-Petch relationship breaks down and the hardness values saturate at about 4.6 GPa; moreover, there are shear bands formed around their indents and strain bursts occurring during the load-holding process of indentation creep. These results imply that there is a transition of the deformation mechanism in the region where the periodicity is equal to 20 nm. This transition of the deformation mechanism can be ascribed to grain-size-dependent competition between the dislocations-mediated plasticity and grain-boundary sliding-mediated plasticity.
语种	英语 ; 英语
出版者	MATERIALS RESEARCH SOC ; WARRENDALE ; 506 KEYSTONE DR, WARRENDALE, PA 15086 USA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/20937]
专题	清华大学
推荐引用方式 GB/T 7714	Wen, S. P.,Zong, R. L.,Zeng, F.,et al. Nanoindentation investigation of the mechanical behaviors of nanoscale Ag/Cu multilayers[J],2010, 2010.
APA	Wen, S. P.,Zong, R. L.,Zeng, F.,Gao, Y.,&Pan, F..(2010).Nanoindentation investigation of the mechanical behaviors of nanoscale Ag/Cu multilayers..
MLA	Wen, S. P.,et al."Nanoindentation investigation of the mechanical behaviors of nanoscale Ag/Cu multilayers".(2010).

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