DEFORMATION AND RECRYSTALLIZATION TEXTURES OF SURFACE-LAYER OF COPPERSHEET

The texture of the surface layer of a 93% cold rolled copper sheet was approximated by {00}[110], which changed to a new texture which may b e approximated by {034}[100] on recrystallization. nle shear texture { 001}[110] was calculated to be stable at d epsilon(12)/d epsilon(11) = root 2 where subscripts 1 and 2 indicate the rolling direction and th e sheet normal direction, respectively. The shear texture and related recrystallization texture did not have a common [111] relationship. wh ich is usually regarded as a token of the oriented growth theory for r ecrystallization. The {034}[100] orientation did not exist as a stable orientation under the condition of the shear texture being stable, wh ich does not seem to support the oriented nucleation theory. The measu red texture orientation, {034}[100], is very close to the {01 root 2}[ 100] orientation which is predicted by the maximum energy release theo ry in which the absolute maximum normal stress direction in the deform ed matrix becomes parallel to the minimum elastic modulus direction of recrystallized grains. (C) 1997 Elsevier Science S.A.