期刊
COMPOSITE INTERFACES
卷 25, 期 4, 页码 357-368出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/09276440.2018.1439625
关键词
Computer simulation; grain growth; particles; Zener pinning; shape effect
资金
- National Natural Science Foundation of China [51501146, 21503165, 51372197, 51701152, 51705415, 51602252]
- Cultivating Research Program of Xi'an University of Science and Technology [201701]
- Key Innovation Team of Shaanxi Province [2014KCT-04]
The pinning effect of different shape second-phase particles on the grain growth in polycrystalline structures is numerical simulated by the phase-field method. Simulation results indicate that the average grain size is highly dependent on the shape and distribution of the second-phase particles, and the shape effect of particles on grain growth restraining is enhanced with increasing numbers of particles. In order to discuss the relation between the constraint grain growth and the second-phase particles, pinning forces induced by different shape particles are theoretically calculated via the Zener pinning theory. The calculated pining forces indicate that the maximum pinning force is highly dependent on the contact mode between grains and particles, and the distance between particles has a significantly influence on the pinning forces. Therefore, controlling the shape and distributions of second-phase particles in polycrystalline metals or ceramics might be an efficient way to achieve materials with specified microstructures.
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