| 压头不同晶向下纳米压痕的多尺度研究 |
| |
| 引用本文： | 李生飞,倪玉山.压头不同晶向下纳米压痕的多尺度研究[J].计算力学学报,2015,32(3):346-352. |
| |
| 作者姓名： | 李生飞 倪玉山 |
| |
| 作者单位： | 复旦大学 力学与工程科学系,上海,200433 |
| |
| 基金项目： | 国家自然科学基金(10576010)资助项目. |
| |
| 摘 要： | 为了研究压头晶体各向异性对纳米压痕的影响,采用多尺度准连续介质(QC)法模拟了不同晶向Ni压头与Ag薄膜的纳米压痕过程。通过对比不同晶向下压头在薄膜上触发的原子滑移,发现压头的晶向引起的界面失配位错在很大程度上决定薄膜开启初始原子滑移系的难易。然后对比了压头在不同晶向下测得的薄膜纳米硬度,发现其计算值是一样的。最后研究压头表面和压痕表面的正应力和切应力的分布,分析了应力分布与原子滑移系的关系。
|
| 关 键 词： | 纳米压痕 晶体各向异性 失配位错 应力分布 |
| 收稿时间： | 2014/4/23 0:00:00 |
| 修稿时间： | 2014/6/25 0:00:00 |
Effect of indenter's crystalline anisotropy on nanoindentation by multiscale analysis |
| |
| LI Sheng-fei and NI Yu-shan.Effect of indenter's crystalline anisotropy on nanoindentation by multiscale analysis[J].Chinese Journal of Computational Mechanics,2015,32(3):346-352. |
| |
| Authors: | LI Sheng-fei and NI Yu-shan |
| |
| Institution: | Department of Mechanics and Engineering Science, Fudan University, Shanghai 200433, China;Department of Mechanics and Engineering Science, Fudan University, Shanghai 200433, China |
| |
| Abstract: | Ni indenter and Ag thin film are used to research the effect of indenter's crystalline anisotropy on nanoindentation by quasicontinuum method.Ni indenter in different crystal direction presses into Ag thin film,respectively.The atomic slips which triggered by different indenter are compared with each other.According to the result,the misfit dislocation is a very important factor to determine emission of atomic slip.The nanohardness of Ag thin film is calculated.The values of Ag hardness we got are the same when the crystal direction of Ni indenter is different.The normal stress and shear stress on the indenter surface is studied and the relationship between these stress and atomic slip in thin film is analyzed. |
| |
| Keywords: | nanoindentation crystalline anisotropy misfit dislocation stress distribution |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《计算力学学报》浏览原始摘要信息 |
| 点击此处可从《计算力学学报》下载免费的PDF全文 |
|
