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	The equivalent axisymmetric model for Berkovich indenters in power-law hardening materials
	Shi, Z. ; Feng, X. ; Huang, Y. ; Xiao, J. ; Hwang, K. C.
	2010-10-12 ; 2010-10-12
关键词	Berkovich indenter 3D finite element analysis Indenter angle Micro-indentation hardness Strain gradient STRAIN GRADIENT PLASTICITY INDENTATION EXPERIMENTS CONVENTIONAL THEORY MICRO-INDENTATION NANO-INDENTATION TIP RADIUS HARDNESS DEFORMATION MICROINDENTATION SUBSTRATE Engineering, Mechanical Materials Science, Multidisciplinary Mechanics
中文摘要	Nix and Gio [Nix, W.D., Cao, H.J., 1998. Indentation size effects in crystalline materials: a law for strain gradient plasticity. journal of the Mechanics and Physics of Solids 46, 411425] established an important relation between the micro-indentation hardness and indentation depth for axisymmetric indenters. For the Berkovich indenter, however, this relation requires an equivalent cone angle. Qin et al. [Qin, J.. Huang, Y., Xiao, J., Hwang, K.C.. 2009. The equivalence of axisymmetric indentation model for three-dimensional indentation hardness. journal of Materials Research 24, 776-783] showed that the widely used equivalent cone angle from the criterion of equal base area leads to significant errors in micro-indentation, and proposed a new equivalence of equal cone angle for iridium. it is shown in this paper that this new equivalence holds for a wide range of plastic work hardening materials. In addition, the prior equal-base-area criterion does not hold because the Berkovich indenter gives much higher density of geometrically necessary dislocations than axisymmetric indenter. The equivalence of equal cone angle, however, does not hold for Vickers indenter. (C) 2009 Elsevier Ltd. All rights reserved.
语种	英语 ; 英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD ; OXFORD ; THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/79114]
专题	清华大学
推荐引用方式 GB/T 7714	Shi, Z.,Feng, X.,Huang, Y.,et al. The equivalent axisymmetric model for Berkovich indenters in power-law hardening materials[J],2010, 2010.
APA	Shi, Z.,Feng, X.,Huang, Y.,Xiao, J.,&Hwang, K. C..(2010).The equivalent axisymmetric model for Berkovich indenters in power-law hardening materials..
MLA	Shi, Z.,et al."The equivalent axisymmetric model for Berkovich indenters in power-law hardening materials".(2010).

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