期刊
WEAR
卷 498, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.wear.2022.204313
关键词
Crystal plasticity; Crystallographic orientation; Grain boundary; Nanoscratching
资金
- Innovative and Entrepreneurial Doctor Project of Jiangsu Province [JSSCBS20210967]
- Jiangsu Planned Projects for Postdoctoral Research Funds, Science Challenge Project [TZ2018006-0201-02]
- National Natural Sci-ence Foundation of China [51405106]
Crystallographic orientations and grain boundaries have significant effects on the friction and wear performance of polycrystalline materials. This study used experiments and simulations to show the underlying effect of crystallographic orientations and grain boundaries on the nanoscratching behavior of bi-crystal Cu.
Microstructural-related deformation behaviour at grain levels significantly affects mechanical properties of crystalline materials. Particularly, crystallographic orientations and grain boundaries play crucial roles in the friction and wear performance of polycrystalline materials at the microscale. In this study, experiments and corresponding crystal plasticity finite element simulations are conducted using a spherical indenter to illustrate the underlying effect of crystallographic orientations and grain boundaries on the nanoscratching behaviour of a unique bi-crystal Cu. The indenter size and process parameters in simulations are consistent with experiments, and crystallographic orientations of two designated individual grains on the polycrystalline surface are determined via electron backscatter diffraction pattern. The simulation results show that crystallographic orientations significantly affect the plastic deformation of the target material by activating different slip systems. Grain boundary can act as an obstacle as well as a starting point of the dislocation movement, leading to anisotropic wear behaviour in the vicinity of the grain boundary. Furthermore, the simulated scratched surface morphology of the bi-crystal Cu quantitatively shows good agreement with the experimental results.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据