GROWTH-RATES AND MISORIENTATION RELATIONSHIPS BETWEEN GROWING NUCLEI GRAINS AND THE SURROUNDING DEFORMED MATRIX DURING RECRYSTALLIZATION

Average growth rates and misorientations between recrystallization nuc lei (or grains) and neighbouring deformed matrix material have been st udied for partially recrystallized samples by the electron back scatte ring pattern (EBSP) technique in heavily cold rolled aluminium and cop per. It was studied how the annealing time and the crystallographic or ientation of nuclei/grains affects the growth rates and distribution o f misorientations. The two materials, aluminium and copper, develop a weak and a strong recrystallization cube texture respectively. Informa tion about effects of cube texture strength was therefore also obtaine d. It was found that grains of cube orientation grow faster than grain s of other orientations. A wide distribution of misorientation relatio nships was observed to exist between the growing grains and the neighb ouring deformed matrix, and this distribution was not significantly af fected by the annealing time. The faster growth of the cube oriented g rains may be ascribed to a larger misorientation between cube grains a nd deformed matrix than that between other grains and the matrix.