چكيده به لاتين
Aluminum wires of varying diameters, due to their widespread application in various industries, particularly in electrical power transmission, hold significant importance. As a result, improving their performance has gained attention from researchers and industry professionals. In recent years, severe plastic deformation methods have been employed to enhance the mechanical properties of these wires. One of the most effective and powerful techniques for examining microstructure is the use of crystal plasticity models. In this study, the microstructural evolution of a commercially pure aluminum wire with a diameter of 4 mm under torsional loading is investigated using the spectral solver (FFT) of the DAMASK software. To achieve this, spectral crystal plasticity (CPFFT) was applied to a representative volume element (RVE) containing 15 grains. A non-random initial texture was assigned to the RVE in the form of quaternions, and then the deformed quaternions due to shear were extracted using the spectral crystal plasticity solver. Using the MTEX software package available in MATLAB, these numbers were converted into pole figures, inverse pole figures, and orientation distribution functions (ODFs), and then plotted. The CPFFT results were validated against experimental data from Electron Backscatter Diffraction (EBSD) tests. A comparison of the results for a sample with a rotation of π radians showed that the A, A_2^* and B components from the pole figure results, and the B̅ component from the ODF results, were consistent between the EBSD and CPFFT tests. Furthermore, in the inverse pole figure analysis of both experimental and simulation results, a higher intensity of the [001] crystal direction was observed after the application of shear deformation in both results. These similarities between the experimental and numerical simulation results demonstrate the agreement between the two. The ultimate strength of the aluminum wire, deformed under torsional loading, increased compared to the undeformed wire, indicating improved mechanical properties. Additionally, hardness tests revealed an increase in average hardness on the surface of the deformed sample compared to the undeformed sample.
