Abstract:The microstructure evolution and recrystallization mechanism of compressed Al-10Mg alloy with and without addition of Sc and Zr have been observed through electron back-scattered diffraction (EBSD) and transmission electron microscope (TEM). Through precipitate of Al3(Sc,Zr) precipitation, original grain is ferined. Also, flow stress can be increased. In the presence of Al3(Sc,Zr) precipitation, dislocation motivation is impeded; concentration of dislocation in grain boundary yet, deformation band is decreased and not enough for nucleation of recrystallized grain; accumulation and annihilation of dislocation is affected. Recrystallization grain is formed through rotation of subgrain in Al-10Mg-Sc-Zr alloy. After which, recrystallization mechanism of Al-10Mg alloy was changed from discontinuous dynamic recrystallization (DDRX) into continuous dynamic recrystallization (CDRX).