Influence of temperature and local structure on the shear-coupled grain boundary migration
L Zhang and C Lu and G Michal and K Tieu and X Zhao and GY Deng, PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, 254, UNSP 1600477 (2017).
Grain boundary migration plays a significant role on the deformation and mechanical properties of ultrafine-grained and nanocrystalline materials. How does the temperature and local structure effect on the behavior of grain boundary migration has not been well understood. In this study, molecular dynamics simulations are carried out to examine the shear-coupled grain boundary migration in bicrystal Al with various sigma 5001(310) GB structures at a wide range of temperatures. The simulation result reveals that the shear-coupled behavior of grain boundary migration is sensitive to the temperature and local boundary structure. The increased temperature can facilitate GB structural transformation and, therefore, change its coupling mode.
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