AGING BEHAVIOR AND PROPERTIES OF ULTRAFINE- GRAINED ALUMINUM ALLOYS OF Al-Mg-Si SYSTEM

This work is focused on the study of the features of ultrafine-grained (UFG) structure formation, mechanical properties and electrical conductivity of the aluminum alloys of Al-Mg-Si system subjected to severe plastic deformation (SPD). High strength of the material under study is provided by UFG state due to the decrease in grain size and formation of hardening phase precipitations in the aluminum matrix after aging. The increased electrical conductivity in the material results from the decrease in concentration of the alloying elements in the aluminum matrix because of solid solution decomposition during SPD processing and also less disloca- tion density in the formed structure.