29 citations · 29 across the 3 of their papers we have counts for
9 papers
Disconnection-Mediated Twin/Twin-Junction Migration in FCC metals
Mingjie Xu, Kongtao Chen, Fan Cao +7
We present the results of novel, time-resolved, in situ HRTEM observations, molecular dynamics (MD) simulations, and disconnection theory that elucidate the mechanism by which the…
Grain-Boundary Topological Phase Transitions
Kongtao Chen, David J. Srolovitz, Jian Han
The formation and migration of disconnections (line defects constrained to the grain boundary (GB) plane with both dislocation and step character) control many of the kinetic and d…
On the Temperature Dependence of Grain Boundary Mobility
Kongtao Chen, Jian Han, David J. Srolovitz
The grain boundary (GB) mobility relates GB velocity to the thermodynamic driving forces and is central to our understanding of microstructure evolution in polycrystals. Recent mol…
Grain boundary triple junction dynamics: a continuum disconnection model
Chaozhen Wei, Luchan Zhang, Jian Han +2
The microstructure of polycrystalline materials consists of networks of grain boundaries (GBs) and triple junctions (TJs), along which three GBs meet. The evolution of such microst…
A Continuum Multi-Disconnection-Mode Model for Grain Boundary Migration
Chaozhen Wei, Spencer L. Thomas, Jian Han +2
We study the Grain Boundary (GB) migration based on the underlying disconnection structure and mechanism. Disconnections are line defects that lie solely within a GB and are charac…
Strong phonon localization in PbTe with dislocations and large deviation to Matthiessen's rule
Yandong Sun, Yanguang Zhou, Jian Han +5
Dislocations can greatly enhance the figure of merit of thermoelectric materials by prominently reducing thermal conductivity. However, the evolution of phonon modes with different…