Vortex extrusion (VE), as a severe plastic deformation technique, uses a novel designed stationary die that imposes intense strain to the processed material. Materials in the VE process experience torsional deformation and simultaneous reduction in area. The amount and intensity of this additional deformation vary according to the radius moving from the center to the surface of the VE die due to variations in the path of the material through a radius proposed by the Beziers’ formulation. In the present study, the VE die is designed through a streamline approach based on a cubic Beziers’ formulation that was employed to investigate the microstructural and mechanical properties of the processed samples and to link the results to those obtained through a finite element analysis of this technique. The results of the microstructural characterization exhibit a higher fraction of high-angle grain boundaries of the VE processed samples compared to what can be achieved by conventional extrusion-processed. Consequently, a significant improvement was observed in tensile properties of the samples after SPD processing using the proposed streamlined VE die.

涡旋挤出（VE）是一种严格的塑性变形技术，它使用新颖设计的固定模具，该模具对加工的材料施加很大的应变。VE过程中的材料会发生扭转变形并同时减小面积。由于材料通过贝塞尔曲线公式所建议的半径的路径的变化，这种附加变形的量和强度会根据从VE模具的中心到表面的半径而变化。在本研究中，VE模具是基于立方贝塞尔曲线的公式通过流线型方法设计的，该公式用于研究加工样品的微观结构和力学性能，并将结果与​​通过有限元分析获得的结果联系起来技术。与常规挤压加工相比，显微组织表征的结果显示出VE加工样品的高角度晶界比例更高。因此，在使用建议的流线型VE模具进行SPD处理后，观察到样品的拉伸性能有了显着改善。