When the hole diameter is equal to the particle size, the encumbrance force is the least and the velocity of boundarymigration 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。
2
The alloy phases are mostly distributed over the grain boundary in the form of compound phases, and they can hold back grain boundarymigration.
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。
3
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 boundarymigration.