中國(guó)有色金屬學(xué)報(bào)(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 22 No. 11 November 2012 |
（1. Department of Materials Engineering, Shiraz Branch, Islamic Azad University, Shiraz, Iran;
2. Department of Materials Science and Engineering, School of Engineering, Shiraz University, Shiraz, Iran）
Abstract:The capability of the torsion extrusion (TE) process as a severe plastic deformation (SPD) method was compared with the conventional forward extrusion (FE) process. The TE and FE processes were successfully performed on AA1050 alloy samples at room temperature. To simulate the above mentioned processes, finite element analysis was carried out using the commercial elasto-plastic finite element analysis ABAQUS/Explicit Simulation. It is shown that load requirement for the TE process is lower than that for the FE process. The equivalent plastic strain calculated by the FEA proved that higher values of strain are imposed to the sample in the TE process. The strain distribution for the TE sample at the final stage of extrusion shows smoother strain gradient in comparison with the one produced by the FE process.
Key words: AA-1050 alloy; severe plastic deformation (SPD); torsion extrusion (TE); equivalent plastic strain; strain distribution; deformation energy
