Grain boundary diffusion and viscous flow governed mechanical relaxation in polycrystalline materials
文献类型：期刊论文
| 作者 | Duan CC(段闯闯); Wei YJ(魏宇杰) ; Wei YJ(魏宇杰)
|
| 刊名 | SCIENCE CHINA-MATERIALS
 ; 5
|
| 出版日期 | 2022-05 |
| 卷号 | 65页码:1403 |
| ISSN号 | 2095-8226 |
| 关键词 | grain boundary diffusion viscous flow internal friction spectrum polycrystalline materials Zener-Ke dissipation |
| DOI | 10.1007/s40843-021-1837-9 |
| 英文摘要 | Grain boundary (GB) diffusion and viscous flow play dominant roles in mechanical relaxation of polycrystalline materials. The pioneering work of Zener and Ke, by accounting for relaxation in GBs by viscous shearing, predicts a single peak in the internal friction spectrum. Later investigations show the existence of two to three peaks in the internal friction spectrum when taking into account both GB diffusion and viscous flow for dissipation. In this paper, we further identify the characteristic relaxation modes in polycrystalline materials. We illustrate that competitive viscous flow and diffusion for normal stress relaxation give rise to distinct dependence of relaxation time on grain size. We construct an internal friction spectrum mapping based on the competitive deformation mechanisms including viscous flow in both normal and tangential directions and GB diffusion. The essential features of internal friction spectrum of polycrystalline materials from our analysis are consistent with available experimental observations. These findings may also be applicable to study relaxation dynamics of other material systems such as metallic glasses and porous materials. |
| 学科主题 | Materials Science, Multidisciplinary |
| 分类号 | 二类/Q1 |
| 语种 | 英语 |
| WOS记录号 | WOS:000726264700001 |
| 资助机构 | National Natural Science Foundation of China [11988102, 11790291] |
| 其他责任者 | Wei, YJ (corresponding author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China. ; Wei, YJ (corresponding author), Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China. |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/90219]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 通讯作者 | Wei YJ(魏宇杰) |
| 作者单位 | 1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Duan CC,Wei YJ,Wei YJ. Grain boundary diffusion and viscous flow governed mechanical relaxation in polycrystalline materials[J]. SCIENCE CHINA-MATERIALS, 5,2022,65:1403. |
| APA | 段闯闯,魏宇杰,&Wei YJ.(2022).Grain boundary diffusion and viscous flow governed mechanical relaxation in polycrystalline materials.SCIENCE CHINA-MATERIALS,65,1403. |
| MLA | 段闯闯,et al."Grain boundary diffusion and viscous flow governed mechanical relaxation in polycrystalline materials".SCIENCE CHINA-MATERIALS 65(2022):1403. |
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。