Abstract:The process of accumulative roll-bonding was reviewed. The principle of ARB, the ARB processed microstructure and mechanical properties were described in detail. The shear strain, mechanism of grain refining and strengthening were analyzed. Large size materials with ultrafine grains can be achieved easily by ARB process, whose tensile strength is usually 2−4 times compared with those of coarse grain materials. The strengthening can be attributed to the ultrafine grains, dislocation and texture developed during ARB process, as well as the dispersed oxide films and inclusions on the surfaces by repetition. According to its advantages on the manufacture of high-strength bulk materials at a high level of productivity, ARB is a promising process in preparing materials with UFG microstructure.

Key words: accumulative roll-bonding; ultrafine grains; severe plastic deformation; microstructure; mechanical properties