摘要：The dislocation mechanisms of dynamicrecovery (DRV) in metals of high stacking faultenergy (SFE) give rise to steady-state strainingdependent on temperature and strain ratedue to development of constancy in thespacings of subgrain boundaries (wS, SGB)and of the dislocations within both the SGBand the subgrains. When the grains are largecompared to subgrains, the interactions ofgrain boundaries with SGB are limited tos e rration formation but when one-graindimension is reduced to about twice the SGBspacing, the interactions begin to define aminimum grain dimension. However, thecellular size defined by the mixture of SGBand GB remains constant at wS along withthe stress. In metals of low SFE, the above isseldom attained since dynamicrecrystallization (DRX) intervenes to providenew grains more than twice the subgrain size.On a larger scale, transition boundariesbetween deformation bands lying betweendiff e rently slipping and rotating bands,become permanent and rapidly rise in angleand take on GB behavior in both DRV(serrations) and in DRX (nucleation sites). Theevidence became more precise as techniquesadvanced through polarized optical,scanning and transmission electron andorientation imaging microscopies; however,deficiencies in each technique often createdconfusions that were resolved only throughdetailed comparison of the evidence.
