Optimized Design of an ECAP Die Using the Finite Element Method for Obtaining Nanostructured Materials

Author:

Ponce-Peña Patricia1,López-Chipres Edgar1,García-Sánchez Edgar2,Escobedo-Bretado Miguel Angel1,Ochoa-Salazar Brenda Xiomara3,González-Lozano María Azucena1

Affiliation:

1. Departamento de Ciencia de Materiales, Facultad de Ciencias Químicas, UJED, Avenida Veterinaria S/N, Circuito Universitario, 34120 Durango, DGO, Mexico

2. Facultad de Ingeniería Mecánica y Eléctrica, Universidad Autónoma de Nuevo León, Avenida Universidad, S/N, Ciudad Universitaria, 66451 San Nicolás de Los Garza, NL, Mexico

3. Departamento de Ingeniería Ambiental, Facultad de Ciencias Forestales, UJED, Rio Papaloapan y Bulevar Durango, 34120 Durango, DGO, Mexico

Abstract

An alloy type A16060 was exposed to severe plastic deformation to study its reaction using the finite element method (FEM). To perform this, six different configurations were used in the design of the die’s channel for ECAP (equal channel angular pressing) to obtain nanostructure materials and to optimize the process. Thanks to simulation performed with FEM, it is possible to study the homogeneity in the deformation due to the variation of conditions affecting directly the material being processed using the ECAP technique, such as the friction coefficient, extrusion speed, and mainly the die’s channel geometry being utilized in the ECAP process. Due to the tensile strain area being located mainly in the upper part of the deformed test cylinder (plastic deformation area) which increases the fracture and cracking tendency preventing the processing through ECAP the die being utilized was modified to eliminate the tensile strain area favoring the appearance of compressive stress which reduces the cracking tendency and the fracture of the sample being processed. The FEM analysis demonstrated that the strain state changed significantly from tension to compression when the modified die was used, facilitating the processing of the piece by ECAP.

Funder

Programa Integral de Fortalecimiento Institucional

Publisher

Hindawi Limited

Subject

General Engineering,General Materials Science

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