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| Influence of Contact Geometry on Hardness Behavior in Nano-indentation | |
Li M ; Chen WM(陈伟民); Cheng YT; Zheng ZM(郑哲敏)
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| Source Publication | Vacuum
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| 2009 | |
| Volume | 84Issue:2Pages:315-320 |
| ISSN | 0042-207X |
| Abstract | 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. |
| Keyword | Indenter Tip Roundness Surface Roughness Hardness Nano-indentation |
| DOI | 10.1016/j.vacuum.2009.07.001 |
| URL | 查看原文 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000270626000004 |
| WOS Keyword | STRAIN GRADIENT PLASTICITY ; SIZE-DEPENDENT HARDNESS ; SINGLE-CRYSTALS ; ROUGH SURFACES ; RIGID FLAT ; NANOINDENTATION ; DEPTH ; SOLIDS |
| WOS Research Area | Materials Science ; Physics |
| WOS Subject | Materials Science, Multidisciplinary ; Physics, Applied |
| Funding Organization | National Science Foundation of China(10772183 10532070) |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/44080 |
| Collection | 环境力学重点实验室(2009-2011) |
| Corresponding Author | Chen 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. |
| Files in This Item: | Download All | |||||
| File Name/Size | DocType | Version | Access | License | ||
| Abstract.doc（29KB） | 开放获取 | License | View Download | |||
| Vacuum2009-315.pdf（504KB） | 开放获取 | License | View Download | |||
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