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)
Source PublicationVacuum
2009
Volume84Issue:2Pages:315-320
ISSN0042-207X
AbstractIn 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.
KeywordIndenter Tip Roundness Surface Roughness Hardness Nano-indentation
DOI10.1016/j.vacuum.2009.07.001
URL查看原文
Indexed BySCI ; EI
Language英语
WOS IDWOS:000270626000004
WOS KeywordSTRAIN GRADIENT PLASTICITY ; SIZE-DEPENDENT HARDNESS ; SINGLE-CRYSTALS ; ROUGH SURFACES ; RIGID FLAT ; NANOINDENTATION ; DEPTH ; SOLIDS
WOS Research AreaMaterials Science ; Physics
WOS SubjectMaterials Science, Multidisciplinary ; Physics, Applied
Funding OrganizationNational Science Foundation of China(10772183 10532070)
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Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/44080
Collection环境力学重点实验室(2009-2011)
Corresponding AuthorChen WM(陈伟民)
Recommended Citation
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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