Dynamic Recrystallization of Copper during Hot Torsion

摘要: AbstractTubular specimens of oxygen-free, high-conductivity copper have been deformed by hot torsion at 800° C (1073 K) (O.8T m ) or 950° (1323 (0.9T strain rates 3.7–11.1 S−1 to true strains ∼ 30. The were quenched room temperature in 3 s under one two conditions: stopping the deformation and then quenching immediately, followed quickly deformation. resulting structures examined optical transmission electron microscopy. after had recrystallized statically (subsequent deformation) during cooling. without until not but retained as-worked grains that formed dynamic recrystallization (concurrent with deformation). Since these nucleated different times deformation, they contained dislocation substructures varying densities. theories static ar...