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- Title
A new method for predicting dislocation emission of grain boundary in bicrystal Mg.
- Authors
Ma, Jiaping; Yuan, Lin; Duan, Yuanxing; Shan, Debin; Guo, Bin
- Abstract
Due to its high volume percentage, the grain boundary seriously influences the strength and plasticity of nanocrystal materials. Whereas, predicting the onset of plasticity from the equilibrium grain boundary is an unsolved challenge, as the lack of an efficient method to accurately predict the dislocation emission of the grain boundary. Here, by analyzing the stress vector triangle of the intrinsic interfacial stress vector and the applied external stress vector, the dislocation emission of [2 1 ¯ 1 ¯ 0] asymmetrical tilt grain boundary (ATGB) in bicrystals Mg can be accurately predicted. The distribution of the stress vector at equilibrium [2 1 ¯ 1 ¯ 0] ATGB was obtained via the dislocation analysis method. The atomic simulation results show that the dislocation emission behaviors of [2 1 ¯ 1 ¯ 0] ATGB with various tilt angles are consistent with the analytical results of the stress vector triangle. The presented method helps researchers design high-plasticity metallic materials via grain boundary engineering.
- Subjects
CRYSTAL grain boundaries; INTERFACIAL stresses; STRESS concentration; MATERIAL plasticity; RESEARCH personnel; GRAIN
- Publication
Journal of Materials Science, 2023, Vol 58, Issue 38, p15219
- ISSN
0022-2461
- Publication type
Article
- DOI
10.1007/s10853-023-08965-8