The effects of Sc on microstructure,recrystallization temperature and mechanical properties of Al-Mg
alloy were studied by optical microscope,hardness measurement,tensile testing and TEM techniques. The results show
that Sc can improve the mechanical properties effectively, prevent the recrystallization of Al-Mg alloy,The dispersed
secondary Al(Sc,Zr) phase precipitated from 琢(Al) is coherent with the matrix after high temperature annealing re鄄
sulting in high recrystallization temperature and tensile properties of 1570 alloy.