Strain-induced migration of tilt grain boundaries

Experimental results showing the influence of strain on the migration of 〈1 1 2〉 tilt grain boundaries in Al bicrystals are presented. The bicrystals were deformed in a channel-die experiment with different levels of strain and then annealed at different temperatures. The migration of the boundaries was measured in situ by X-ray diffraction. The activation enthalpies were determined from the in situ data and it is shown that the strain level influences the activation parameters for strain-induced grain boundary migration.