The article send to 'Materials Science Forum':

'Early stages of recrystallization in ECAP-deformed AA1050 alloy
investigated by SEM orientation mapping'

Jagoda Poplewska, Henryk Paul, Katarzyna Berent

Keywords: nucleation & recrystallization, AA1050 alloy, ECAP, second phase particles, orientation mapping;

Abstract
Early stages of recrystallization were observed for the technical purity aluminium
alloy (AA1050). The samples were severely deformed by equal channel angular pressing and then annealed to obtain the state of partial recrystallization. The nucleation of new grains and the changes in ‘density’ of low- and high- angle boundaries were analysed using scanning electron microscopy equipped with high resolution EBSD system. After deformation in six passes along route A the alloy contained a structure of flat grains. On annealing, the structure coarsened and got transformed into nearly equiaxed grains by both discontinuous and continuous recrystallization. A particular role in the rise of nuclei and the structure spheroidization is attributed to migration of low-angle boundaries.