K. Kashihara et al., SURFACE EFFECTS ON RECRYSTALLIZATION AT D EFORMATION BANDS IN ALUMINUM SINGLE-CRYSTALS DEFORMED IN TENSION, Nippon Kinzoku Gakkaishi, 58(4), 1994, pp. 404-410
Effects of free surface on the formation of recrystallized grains were
discussed in terms of the differences in the deformation structure, r
ecovery process, and total energy of grain boundaries around a recryst
allization nucleus between the surface and inner layers in an aluminum
single crystal with a Schmid factor of 0.5. For this purpose, the spe
cimens were deformed in tension to the strain of 0.5 and subsequently
annealed. During the annealing, the existence of the free surface prom
otes the formation of recrystallized grains in the surface layer. It i
s concluded that the recovery of deformed structures with a high densi
ty of dislocations is easier and the total energy of grain boundaries
around a nucleus of recrystallization is smaller in the surface layer
than in the inner layer.