Microstructure and Properties of Cold Rolled and Annealed Al-Mg Alloys

Ljubica Radović, MSc (Eng)

Milutin Nikačević, MSc (Eng)

 

The effect of Mg content and thermomechanical processes on microstructural evolution, mechanical and physical properties of cold rolled and annealed Al-Mg alloys containing 3-6% Mg and around 0.5wt.% Mn, have been investigated by means of optical microscopy, hardness and electrical conductivity measurements. For a given composition, it was found that the final grain size of the recrystallized material decreases with increasing strain as well as with the increasing Mg content. In alloys with 4.5 and 6% Mg the grain size at critical strain decreases with addition of Mn.

Key words: Al-Mg alloys, microstructure, cold rolling, annealing, hardness, electrical conductivity, critical strain, grain size.