Compressional and torsional severe plastic deformation method using restrictive ring

摘要

The present invention relates to a ring restraint method capable of restraining the material edge to the ring by restricting the movement of the material in the outward direction and suppressing the generation of tensile stress by the ring restraint method to prevent the loss and destruction of the material, and a compression torsionally rigid working method Comprising the steps of forming a molded body and restricting the outer periphery of the molded body with a ring and applying a compressive stress to the molded body confined by the ring using a mold provided with upper and lower bearings, And rotating one or both of the supports to apply a rotational force. According to the present invention, the microstructure of the brittle material can be controlled by subjecting a brittle material that has not been used in the conventional compression torsion process to a compressive twisting process through a ring constraining method.