Nucleation of recrystallized grains in multiple slipped structure without deformation band in aluminum single crystal

The characteristics of multiple slipped structure and the nucleation of recrystallized grains (RGs) have been investigated using pure aluminum single crystals with an initial tensile axis (TA) orientation of [111] deformed in tension. By a scanning electron microscope (SEM), very short and wavy slip traces without deformation bands (DBs) were observed, in which the maximum misorientation was only approximately 5 degrees. By a transmission electron microscope (TEM), it is found that a layered dislocation microstructure consisted of cells with dense dislocation walls (DDWs) was developed. Groups of the cells were mutually rotated, by approximately 4 degrees, about an axis normal to the TA as if they maintained tensile strain and compressive strain by turns. After annealing, orientations of RGs were mainly rotated at angles of over 26 degrees about each [111] axis normal to four kinds of [111] slip planes in each adjacent deformed matrix (DM). It is renewed in more detail that the nucleation of the RGs with the [111] rotation relationship to each adjacent DM could be explained by the [111] rotation recrystallization (nucleation) model. The [111] rotation relationships between the deformation textures and the corresponding annealing textures in FCC metals are selected in both stages of the nucleation of RGs as well as their growth. (C) 2000 Elsevier Science S.A. All rights reserved.