Recrystallization in a Hot Deformed Al-Mg-Si Alloy: The Effect of Fine Precipitates

The recrystallization of an Al-Mg-Si alloy deformed by plane strain compression at 400°C and 1 s^-1 has been studied. Fine particles are found to have a significant influence on the development of recrystallization textures. Annealing at 400°C, in the presence of Al-Fe-Si particles located on boundaries, results in a weak recrystallization texture. There is a clear indication that grain nucleation is associated with abnormal subgrain growth. The occurrence of this recovery process is analyzed by taking into account the particle pinning pressure and the orientation dependence of boundary energy and mobility. The cube recrystallization texture observed after annealing at 510°C is discussed in terms of the stability of Mg₂Si and Al-Fe-Si precipitates.