Microstructure and mechanical properties of AA6061 alloy deformed by differential speed rolling

摘要

In the present work, we investigated microstructure features and mechanical properties of AA6061 aluminum alloy fabricated by differential speed rolling (DSR) process. The alloy samples were subjected to a DSR deformation using a roll-speed-ratio of 1:4 at various thickness reductions. The results showed the DSR deformation leads to the evolution of an ultrafine grained structure containing a reasonable fraction of low angle grain boundaries. The evolution of this structure after 75% resulted in high hardness values uniformly distributed in the thickness direction of the sample. (C) 2019 Elsevier B.V. All rights reserved.