Hardness Trends in Micron Scale Indentation
文献类型：期刊论文
| 作者 | Wei YG(魏悦广) ; Hutchinson JW
|
| 刊名 | Journal of the Mechanics and Physics of Solids
 |
| 出版日期 | 2003 |
| 卷号 | 51期号:11-12页码:2037-2056 |
| ISSN号 | 0022-5096 |
| 通讯作者 | Hutchinson, JW (reprint author), Harvard Univ, Div Engn & Appl Sci, Pierce Hall, Cambridge, MA 02138 USA. |
| 中文摘要 | A continuum theory for elastic-plastic solids that accounts for the size-dependence of strain hardening is employed to analyze trends in the indentation hardness test. Strain gradient plasticity theory incorporates an elevation of flow stress when non-uniform plastic deformations occur at the micron scale. Extensive experimental data exists for size-dependence of indentation hardness in the micron range for conical (pyramidal) indenters, and recent data delineates trends for spherical indenters. Deformation induced by rigid conical and spherical indenters is analyzed in two ways: by exploiting an approximation based on spherically symmetric void expansion and by finite element computations. Trends are presented for hardness as a function of the most important variables in the indentation test, including the size of the indent relative to the material length parameters, the strain hardening exponent, the ratio of initial yield stress to Young's modulus, and the geometry of the indenter. The theory rationalizes seemingly different trends for conical and spherical indenters and accurately simulates hardness data presented recently for iridium, a low yield strain/high hardening material. The dominant role of one of the material length parameters is revealed, and it is suggested that the indentation test may the best means of measuring this parameter. |
| 学科主题 | 力学 |
| 类目[WOS] | Materials Science, Multidisciplinary ; Mechanics ; Physics, Condensed Matter |
| 研究领域[WOS] | Materials Science ; Mechanics ; Physics |
| 关键词[WOS] | STRAIN GRADIENT PLASTICITY ; DEFORMATION |
| 收录类别 | SCI ; EI |
| 语种 | 英语 |
| WOS记录号 | WOS:000187349400011 |
| 公开日期 | 2007-06-15 ; 2007-12-05 ; 2009-06-23 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/15390]  |
| 专题 | 力学研究所_力学所知识产出(1956-2008) |
| 推荐引用方式 GB/T 7714 | Wei YG,Hutchinson JW. Hardness Trends in Micron Scale Indentation[J]. Journal of the Mechanics and Physics of Solids,2003,51(11-12):2037-2056. |
| APA | 魏悦广,&Hutchinson JW.(2003).Hardness Trends in Micron Scale Indentation.Journal of the Mechanics and Physics of Solids,51(11-12),2037-2056. |
| MLA | 魏悦广,et al."Hardness Trends in Micron Scale Indentation".Journal of the Mechanics and Physics of Solids 51.11-12(2003):2037-2056. |
入库方式： OAI收割
来源：力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。