Effect of Stacking Fault Energy on Recrystallization in Cold Worked FCC Crystals

抄録

Recrystallization in Cu and Cu–Al alloys has been investigated by the aid of in situ experiments with a 3 MV electron microscope. The results are summarized as follows: (a) Recrystallization generally becomes difficult to occur in crystals with low stacking fault energies (LSFE-crystals) because of small crystal-rotation in local regions. (b) The heterogeneous deformation markedly results from the twin-deformation in LSFE crystals, and the nucleation sites of recrystallization are limited to such heavily deformed regions. (c) The easiness of recrystallization increases again with decreasing stacking fault energy in heavily deformed specimens, because the occurrence of twin-deformation is inversely proportional to the stacking fault energy. (d) Growth rate of recrystallized grains decreases with decreasing stacking fault energy because of high formation rate of annealing-twins.
Based on the results, the effect of stacking fault energy recrystallization is discussed.