THE ROLES OF ORIENTED NUCLEATION AND ORIENTED GROWTH ON RECRYSTALLIZATION TEXTURES IN COMMERCIAL PURITY ALUMINUM

The development of the recrystallization texture in commercial purity Al (AA1145) containing large Al3Fe precipitates was investigated to de termine the dependence on the degree of deformation and recrystallizat ion temperature by means of X-ray macrotexture analysis. The amount of Fe in solid solution was varied by applying different heat treatments . The recrystallization textures develop from the competition between the Cube-orientation, the R-orientation (similar to the rolling textur e S-orientation) and randomly oriented grains due to particle stimulat ed nucleation (PSN). The formation of these orientations is discussed in terms of their nucleation and subsequent growth behaviour. Particul ar attention is focused on the influence of the process parameters, i. e. strain, temperature and heating rate, on the ratio between the indi vidual orientations in the recrystallization textures.