College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China
*Corresponding author e-mail: kawunga.nyirenda2009@gmail.com
Online published on 11 September, 2014.
In this work, AA7075/AA1100 multilayer sheet has been processed by accumulative roll-bonding to a large strain followed by a T6 heat treatment. The rolling work was done at the solution temperature of AA7075. The strength, microhardness and ductility of the ARB sheet have been increased. The microstructure had a UFG structure with average grain size of less than 0.1μm and a lot of dislocations. It was found that the reduced grain size was responsible for the increase of not only the strength but also the ductility of the sheet.
Strength, multilayer, ductility, Accumulative roll bonding
