Statistical analysis of grain boundary mobility in Al simulated using a modified synthetic driving force molecular dynamics method

Abstract

The intrinsic mobilities of a series of symmetrical tilt grain boundaries (GBs) in Al were simulated using a modified synthetic driving force method. Statistical analysis of the mobility data reveals that low-angle GBs are on average more mobile and show larger spread in their mobilities than high-angle GBs. GBs with axes broadly near 〈111〉 or boundary planes close to {1 1 0} have relatively high mobility. No visible correlation is found between GB mobility and energy.