Influence of Contact Geometry on Hardness Behavior in Nano-indentation
文献类型：期刊论文
| 作者 | Li M ; Chen WM(陈伟民); Cheng YT; Zheng ZM(郑哲敏)
|
| 刊名 | Vacuum
 |
| 出版日期 | 2009 |
| 卷号 | 84期号:2页码:315-320 |
| 通讯作者邮箱 | wmchen@imech.ac.cn |
| 关键词 | Indenter tip roundness Surface roughness Hardness Nano-indentation |
| ISSN号 | 0042-207X |
| 通讯作者 | 陈伟民 |
| 合作状况 | 国际 |
| 中文摘要 | 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. |
| 类目[WOS] | Materials Science, Multidisciplinary ; Physics, Applied |
| 研究领域[WOS] | Materials Science ; Physics |
| 关键词[WOS] | STRAIN GRADIENT PLASTICITY ; SIZE-DEPENDENT HARDNESS ; SINGLE-CRYSTALS ; ROUGH SURFACES ; RIGID FLAT ; NANOINDENTATION ; DEPTH ; SOLIDS |
| 收录类别 | SCI ; EI |
| 资助信息 | National Science Foundation of China(10772183 10532070) |
| 原文出处 | http://dx.doi.org/10.1016/j.vacuum.2009.07.001 |
| 语种 | 英语 |
| WOS记录号 | WOS:000270626000004 |
| 公开日期 | 2011-04-07 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/44080]  |
| 专题 | 力学研究所_环境力学重点实验室(2009-2011) |
| 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. |
入库方式： OAI收割
来源：力学研究所
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