Developing a new method to represent the low and high angle grain boundaries by using multi-scale modeling of crystal plasticity

The main goal of the research is an investigation on a multi-scale crystal plasticity of a finite element model for polycrystalline material by using a hierarchical computational framework and macro/micro structure analysis. Therefore, several systematic numerical studies on the evolution of the microstructure and texture of pure Aluminum during torsion have been performed to identify crystal misorientation. The framework is integrated into ABAQUS finite element package using Dusseldorf Advanced Materials Simulation Kit (DAMASK) software. Then a Python algorithm was developed to examine the high and low grain boundaries, and the results were compared to experimental data of electron back scattering diffraction (EBSD). The findings showed that the torsion texture of pure Aluminum is completely attributed to dislocation sliding, and it was predictable by crystal plasticity. It was also shown that the Brass component with (phi(1),phi,phi(2)) = (35 degrees, 45 degrees, 0 degrees) appeared in the deformed sample. As a result, it is demonstrated that the multi-scale crystal plasticity simulation can predict the effect of inhomogeneous strain on the deformed texture. (c) 2023 Elsevier B.V. All rights reserved.

Automated summary

The research aims to investigate the multi-scale crystal plasticity of polycrystalline materials using a hierarchical computational framework and macro/micro structure analysis. Several numerical studies on the evolution of microstructure and texture in pure aluminum under torsion were performed, revealing crystal misorientation. The framework was integrated into ABAQUS finite element package using DAMASK software and compared with experimental data of EBSD. The findings showed that the torsion texture was attributed to dislocation sliding and could be predicted by crystal plasticity.