Mesoscale Simulation of the Evolution of the Grain Boundary Character Distribution
Mesoscale Simulation of the Evolution of the Grain Boundary Character Distribution
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晶界特征分布演化的细观模拟
DOI：
10.4028/www.scientific.net/msf.467-470.1063
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
P. Yu
中科院分区：
文献类型：
--
作者：
D. Kinderlehrer;I. Livshits;G. Rohrer;S. Ta'asan;P. Yu
本文采用变分法模拟二维晶粒生长过程，探讨了晶界性质对晶界特征分布的影响。晶界能的各向异性比晶界迁移率的各向异性对晶界特征分布的影响更大。随着晶粒生长从初始随机分布进行，晶界特征分布达到取决于晶界能的稳定状态。如果能量仅取决于晶格取向差，则布居和能量由玻尔兹曼分布相关。当能量取决于晶格取向差和边界取向时，稳态晶界特征分布更复杂，并且取决于能量和能量相对于取向的梯度的变化。
A mesoscale, variational simulation of grain growth in two-dimensions has been used to explore the effects of grain boundary properties on the grain boundary character distribution. Anisotropy in the grain boundary energy has a stronger influence on the grain boundary character distribution than anisotropy in the grain boundary mobility. As grain growth proceeds from an initially random distribution, the grain boundary character distribution reaches a steady state that depends on the grain boundary energy. If the energy depends only on the lattice misorientation, then the population and energy are related by the Boltzmann distribution. When the energy depends on both lattice misorientation and boundary orientation, the steady state grain boundary character distribution is more complex and depends on both the energy and changes in the gradient of the energy with respect to orientation.