Influence of Contact Geometry on Hardness Behavior in Nano-indentation

doi:10.1016/j.vacuum.2009.07.001

IMECH-IR > 环境力学重点实验室(2009-2011)

	Influence of Contact Geometry on Hardness Behavior in Nano-indentation
	Li M; Chen WM(陈伟民); Cheng YT; Zheng ZM(郑哲敏)
发表期刊	Vacuum
	2009
卷号	84 期号:2 页码:315-320
ISSN	0042-207X
摘要	In this paper the influence of contact geometry, including the round tip of the indenter and the roughness of the specimen, on hardness behavior for elastic plastic materials is studied by means of finite element simulation. We idealize the actual indenter by an equivalent rigid conic indenter fitted smoothly with a spherical tip and examine the interaction of this indenter with both a flat surface and a rough surface. In the latter case the rough surface is represented by either a single spherical asperity or a dent (cavity). Indented solids include elastic perfectly plastic materials and strain hardening elastic-plastic materials, and the effects of the yield stress and strain hardening index are explored. Our results show that due to the finite curvature of the indenter tip the hardness versus indentation depth curve rises or drops (depending on the material properties of the indented solids) as the indentation depth decreases, in qualitative agreement with experimental results. Surface asperities and dents of curvature comparable to that of the indenter tip can appreciably modify the hardness value at small indentation depth. Their effects would appear as random variation in hardness.
关键词	Indenter Tip Roundness Surface Roughness Hardness Nano-indentation
DOI	10.1016/j.vacuum.2009.07.001
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000270626000004
关键词[WOS]	STRAIN GRADIENT PLASTICITY ; SIZE-DEPENDENT HARDNESS ; SINGLE-CRYSTALS ; ROUGH SURFACES ; RIGID FLAT ; NANOINDENTATION ; DEPTH ; SOLIDS
WOS研究方向	Materials Science ; Physics
WOS类目	Materials Science, Multidisciplinary ; Physics, Applied
项目资助者	National Science Foundation of China(10772183 10532070)
引用统计	被引频次：17[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/44080
专题	环境力学重点实验室(2009-2011)
通讯作者	Chen WM(陈伟民)
推荐引用方式 GB/T 7714	Li M,Chen WM,Cheng YT,et al. Influence of Contact Geometry on Hardness Behavior in Nano-indentation[J]. Vacuum,2009,84,2,:315-320.
APA	Li M,陈伟民,Cheng YT,&郑哲敏.(2009).Influence of Contact Geometry on Hardness Behavior in Nano-indentation.Vacuum,84(2),315-320.
MLA	Li M,et al."Influence of Contact Geometry on Hardness Behavior in Nano-indentation".Vacuum 84.2(2009):315-320.

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