2002 Volume 66 Issue 7 Pages 760-766
Preferential occurrence of dynamic recrystallization (DRX) at triple junction (TJ) in pure copper tricrystals was investigated. DRX at TJ preferentially occurred at lower strain than the peak strain (about 2/3). All of the nucleated DRX grains at TJ were twins. Grain-boundary sliding (GBS) was supposed to cause high stress concentration and deformation concentration near TJ because GBS was impeded at TJ. The twins were seemed to be nucleated behind the grain boundary migrating along the folding which was formed by impediment of GBS at TJ. These combined effects were supposed to cause the preferential DRX nucleation at TJ during high temperature deformation.
