Role of inclination dependence of grain boundary energy on the microstructure evolution during grain growth
Role of inclination dependence of grain boundary energy on the microstructure evolution during grain growth
复制标题
晶界能的倾斜依赖性对晶粒长大过程中微观结构演变的影响
DOI：
10.1016/j.actamat.2020.02.043
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发表时间：
2020-04
期刊：
影响因子：
9.4
通讯作者：
Hesham Salama;J. Kundin;O. Shchyglo;V. Mohles;K. Marquardt;I. Steinbach
中科院分区：
文献类型：
--
作者：
Hesham Salama;J. Kundin;O. Shchyglo;V. Mohles;K. Marquardt;I. Steinbach
采用三维相场模拟方法研究了多晶材料中晶界能的倾斜依赖性对晶粒生长过程中微观结构演化和晶界面取向分布的影响。各向异性晶界能模型利用单个晶体的刻面表面结构的描述，构造了固-固界面的各向异性能。由于晶界能量的倾斜依赖性，通过晶界的小面化发生能量最小化。单个晶粒的模拟结果显示了平衡形状（刻面晶粒形态）的发展与不同的家庭的小面，这与理论预测吻合得很好。立方对称各向同性和各向异性晶界能的晶粒生长模拟结果表明，晶界能的倾斜依赖性对晶界迁移、晶粒生长动力学和晶界平面分布有显着影响。它已被证明，该模型基本上再现了NaCl和MgO多晶系统的晶界平面的各向异性分布的低指数{100}型边界的峰值的实验研究报告。
The role of inclination dependence of grain boundary energy on the microstructure evolution and the orientation distribution of grain boundary planes during grain growth in polycrystalline materials is investigated by three-dimensional phase-field simulations. The anisotropic grain boundary energy model uses the description of the faceted surface structure of the individual crystals and constructs an anisotropic energy of solid-solid interface. The energy minimization occurs by the faceting of the grain boundary due to inclination dependence of the grain boundary energy. The simulation results for a single grain show the development of equilibrium shapes (faceted grain morphologies) with different families of facets which agrees well with the theoretical predictions. The results of grain growth simulations with isotropic and anisotropic grain boundary energy for cubic symmetry show that inclination dependence of grain boundary energy has a significant influence on the grain boundary migration, grain growth kinetics and the grain boundary plane distribution. It has been shown that the model essentially reproduces the experimental studies reported for NaCl and MgO polycrystalline systems where the anisotropic distribution of grain boundary planes has a peak for the low-index {100} type boundaries.