Finite element analysis of the bending behavior of a workpiece in equal channel angular pressing

Abstract

For the first time, a detailed and systematic finite element study was carried to identify the parameters which cause the bending of the workpiece in equal channel angular pressing. These simulations were carried out by using commercial finite element code Abaqus with different materials behavior, processing parameters, and die geometries. The results showed that the optimal ways to reduce the bending of strain rate sensitive materials in ECAP without varying the strain homogeneity are the usage of lower processing speed and the increase in length of the die exit-channel.

3D FEM simulations for the homogeneity of plastic deformation in Al–Cu alloys during ECAP

“…Most of the previous studies done on the ECAP by FEM are in two dimensions (2D) of the plain strain condition. They include the plastic deformation analyses of metallic materials during ECAP [16], the correct selection of die channel in ECAP [17,18], die design for homogeneous plastic deformation during ECAP [19], FEM analysis of ECAP in strain rate sensitive metals [20], texture evolution [21,22], modified ECAP processing [23], bending behavior [24], and the die corner gap formation in ECAP [25]. Also, there is very little work on FEM that has been done by the three dimensional (3D) method.…”

Low-temperature superplasticity and coarsening behavior of Ti–6Al–2Sn–4Zr–2Mo–0.1Si

“…Despite this commercial benefit, the widespread application of such processes may be limited by processing requirements such as high temperature (≥900 • C) and/or low strain rate (≤10 −3 s −1 ) [3,4]. On the other hand, enhanced die-fill capacity/superplasticity can be realized at lower temperatures (≤750 • C) and/or higher strain rates (≥10 −2 s −1 ) by refining the microstructure via severe plastic deformation (SPD) methods such as high pressure torsion (HPT), equal-channel angular extrusion (ECAE), and accumulative roll bonding (ARB) [5][6][7][8][9]. Other efforts have been made to achieve enhanced superplasticity utilizing dynamic globularization of a fine lamellar microstructure, i.e., the conversion of a transformed-beta microstructure to a fine equiaxed microstructure [10][11][12][13].…”

Enhanced mechanical compatibility of submicrocrystalline Ti–13Nb–13Zr alloy

“…On the other hand, many efforts have been concentrated on enhancement of the mechanical properties of CP-Ti and its alloys to increase the lifetime of implant via severe plastic deformation (SPD) techniques which provide submicrocrystalline (SMC) materials [6][7][8][9][10][11][12]. However, practical applications of SPD have been hardly made because it requires significantly large strains of 4-8 to complete the whole process.…”