Size Effect and Geometrical Effect of Solids in Micro-Indentation Test
文献类型：期刊论文
| 作者 | Wei YG(魏悦广) ; Wang XZ(王学峥); Zhao MH(赵满洪); Zheng ZM(郑哲敏); Bai YL(白以龙)
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| 刊名 | Acta Mechanica Sinica
 |
| 出版日期 | 2003 |
| 卷号 | 19期号:1页码:59-70 |
| ISSN号 | 0567-7718 |
| 通讯作者 | Wei, YG (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100080, Peoples R China. |
| 中文摘要 | Micro-indentation tests at scales of the order of sub-micron show that the measured hardness increases strongly with decreasing indent depth or indent size, which is frequently referred to as the size effect. At the same time, at micron or sub-micron scale, another effect, which is referred to as the geometrical size effects such as crystal grain size effect, thin film thickness effect, etc., also influences the measured material hardness. However, the trends are at odds with the size-independence implied by the conventional elastic-plastic theory. In the present research, the strain gradient plasticity theory (Fleck and Hutchinson) is used to model the composition effects (size effect and geometrical effect) for polycrystal material and metal thin film/ceramic substrate systems when materials undergo micro-indenting. The phenomena of the "pile-up" and "sink-in" appeared in the indentation test for the polycrystal materials are also discussed. Meanwhile, the micro-indentation experiments for the polycrystal Al and for the Ti/Si_3N_4 thin film/substrate system are carried out. By comparing the theoretical predictions with experimental measurements, the values and the variation trends of the micro-scale parameter included in the strain gradient plasticity theory are predicted. |
| 学科主题 | 力学 |
| 类目[WOS] | Engineering, Mechanical ; Mechanics |
| 研究领域[WOS] | Engineering ; Mechanics |
| 关键词[WOS] | STRAIN GRADIENT PLASTICITY ; CRACK-TIP FIELDS ; SINGLE-CRYSTALS ; HARDNESS ; WORK |
| 收录类别 | SCI ; EI ; CSCD |
| 语种 | 英语 |
| WOS记录号 | WOS:000181439700007 |
| 公开日期 | 2007-06-15 ; 2007-12-05 ; 2009-06-23 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/17451]  |
| 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,Wang XZ,Zhao MH,et al. Size Effect and Geometrical Effect of Solids in Micro-Indentation Test[J]. Acta Mechanica Sinica,2003,19(1):59-70. |
| APA | 魏悦广,王学峥,赵满洪,郑哲敏,&白以龙.(2003).Size Effect and Geometrical Effect of Solids in Micro-Indentation Test.Acta Mechanica Sinica,19(1),59-70. |
| MLA | 魏悦广,et al."Size Effect and Geometrical Effect of Solids in Micro-Indentation Test".Acta Mechanica Sinica 19.1(2003):59-70. |
入库方式： OAI收割
来源：力学研究所
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