ASYMMETRIC EXTRUSION METHOD AND APPARATUS, AN EXTRUDED MATERIAL MANUFACTURED BY THE SAME, AND DIES FOR ASYMMETRIC EXTRUSION TO IMPROVE THE ROOM-TEMPERATURE FORMABILITY OF EXTRUDED MATERIALS

摘要

PURPOSE: An asymmetric extrusion method and apparatus, an extruded material manufactured by the same, and dies for asymmetric extrusion are provided to obtain improved properties of extruded materials by controlling the texture of the extruded material.;CONSTITUTION: In an asymmetric extrusion method, a material is pushed out through dies(130) with an extrusion hole having an asymmetric shape relative to the planar direction of the material(50) to induce internal shear transformation along the thickness of the material and extrude the material. The extrusion hole includes a tapered portion(134) with a multi-stage hole size to induce multi-stage shear transformation.;COPYRIGHT KIPO 2013