Size Effect and Geometrical Effect of Polycrystals and Thin Film/Substrate System in Micro-indentation Test
文献类型：会议论文
| 作者 | Wei YG(魏悦广) ; Zhao MH(赵满洪); Wang XZ(王学峥)
|
| 出版日期 | 2002 |
| 会议名称 | Symposium on Modeling and Numerical Simulation of Materials Behavior and Evolution held at the 2002 MRS Spring Meeting |
| 会议日期 | APR 02-05, 2002 |
| 会议地点 | SAN FRANCISCO, CA |
| 卷号 | 731 |
| 页码 | 275-280 |
| 中文摘要 | Micro-indentation test at scales on the order of sub-micron has shown that the measured hardness increases strongly with decreasing indent depth or indent size, which is frequently referred to as the size effect. Simultaneously, at micron or sub-micron scale, the material microstructure size also has an important influence on the measured hardness. This kind of effect, such as the crystal grain size effect, thin film thickness effect, etc., is called the geometrical effect by here. In the present research, in order to investigate the size effect and the geometrical effect, the micro-indentation experiments are carried out respectively for single crystal copper and aluminum, for polycrystal aluminum, as well as for a thin film/substrate system, Ti/Si3N4. The size effect and geometrical effect are displayed experimentally. Moreover, using strain gradient plasticity theory, the size effect and the geometrical effect are simulated. Through comparing experimental results with simulation results, length-scale parameter appearing in the strain gradient theory for different cases is predicted. Furthermore, the size effect and the geometrical effect are interpreted using the geometrically necessary dislocation concept and the discrete dislocation theory. Member Price: $0; Non-Member Price: $25.00 |
| 收录类别 | CPCI-S ; EI |
| 会议录 | Materials Research Society Symposium Proceedings
 |
| 学科主题 | 力学 |
| 语种 | 英语 |
| ISSN号 | 0272-9172 |
| WOS记录号 | WOS:000178623800042 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/16138]  |
| 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,Zhao MH,Wang XZ. Size Effect and Geometrical Effect of Polycrystals and Thin Film/Substrate System in Micro-indentation Test[C]. 见:Symposium on Modeling and Numerical Simulation of Materials Behavior and Evolution held at the 2002 MRS Spring Meeting. SAN FRANCISCO, CA. APR 02-05, 2002. |
入库方式： OAI收割
来源：力学研究所
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