ADVANCES IN THE THEORY OF DEFORMATION AND RECRYSTALLIZATION TEXTURE FORMATION

The development of the formation of texture in both rolled and anneale d f.c.c. metals has been reviewed and limitation in the present unders tanding identified. Special attention is given to the problems of the deformation texture transition in f.c.c. materials and to the developm ent of cube texture during recrystallization. Inadequacies in the curr ent deformation models are discussed and recent experimental results b ased on metallographic studies of highly deformed metals presented. Th e work demonstrates the importance of deformation banding as a mechani sm of deformation which significantly influences both the development of the deformation texture and the subsequent recrystallization proces s. Consideration of the additional deformation modes enables a new def ormation model to be developed which gives results in better agreement with experiment. Experiments on cube texture formation in relation to previous recrystallization studies and to the role played by both the oriented-nucleation and the oriented-growth theories in recrystalliza tion is briefly reviewed. Recent work on the role of deformation bandi ng in the formation of cube-oriented volumes having a special orientat ion relationship with their neighbours is presented, leading to a gene ralized theory of the cube recrystallization texture formation.