报告题目：Dynamics of Grain Boundaries Based on Underlying Microstructure

报告人：张露婵 助理教授 香港科技大学 

报告时间：2021-01-07  10:00-11:30

腾讯会议ID：181 214 513

报告入口：https://meeting.tencent.com/s/pULzsRP9oq6b

Abstract: Grain boundaries are surface defects in crystalline materials. Dynamic properties of grain boundaries play vital roles in the mechanical and plastic behaviors of polycrystalline materials. The properties of grain boundaries strongly depend on their microscopic structures. We present continuum models for the dynamics of grain boundaries based on the continuum distribution of the line defects (dislocations or disconnections) on them. The long-range elastic interaction between the line defects is included in the continuum models to maintain stable microstructure on grain boundaries during the evolution. The continuum models is able to describe both normal motion and tangential translation of the grain boundaries due to both coupling and sliding effects that were observed in atomistic simulations and experiments.