When the hole diameter is equal to the particle size, the encumbrance force is the least and the velocity of boundary migration is the highest.
晶界位于粒子直径区位置时所受的阻力最小、运动速度最大。
The alloy phases are mostly distributed over the grain boundary in the form of compound phases, and they can hold back grain boundary migration.
这些合金相大多以复合相形式分布于晶界上，阻止晶界的扩展。
It is shown from TEM analysis that the fine grained matrix materials are mainly derived from the huge clasts by subgrain rotation and local grain boundary migration.
TEM亚微分析表明，细粒基质是由粗大碎屑经过亚颗粒旋转，并伴随着局部颗粒边界迁移形成的动态重结晶颗粒。
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