Abstract: An improved system and method of producing nanostructured or ultrafine grained metals is disclosed. In one embodiment, an improved system and method of producing nanostructured materials includes extruding the material through two deformation zones. The first zone consists of an inlet channel for inputting the material and a narrow channel through which the material is extruded, thus reducing its diameter. The second zone is an angular channel through which the compressed reduced diameter material is extruded to increase its diameter back to the original diameter. This eliminates the need for a dual press to provide back pressure to the material for increasing its diameter. Moreover, the total amount of strain applied to the material includes strain applied as a result of extrusion through the narrow channel and strain applied as a result of extrusion through the angular channel. As a result of the additional strain, fewer passes through the system are needed to achieve a desire strength.

Abstract: An improved system and method of producing nanostructured or ultrafine grained metals is disclosed. In one embodiment, an improved system and method of producing nanostructured materials includes extruding the material through two deformation zones. The first zone consists of an inlet channel for inputting the material and a narrow channel through which the material is extruded, thus reducing its diameter. The second zone is an angular channel through which the compressed reduced diameter material is extruded to increase its diameter back to the original diameter. This eliminates the need for a dual press to provide back pressure to the material for increasing its diameter. Moreover, the total amount of strain applied to the material includes strain applied as a result of extrusion through the narrow channel and strain applied as a result of extrusion through the angular channel. As a result of the additional strain, fewer passes through the system are needed to achieve a desire strength.