Uniaxial compression tests on hot-rolled AZ31 Mg alloy were carried out at 200°C. In
order to investigate the evolution of texture during plastic deformation, cylindrical specimens were
compressed to the rolling and normal directions. Experimental investigation reveals that work
hardening and texture evolution are strongly dependent on the loading direction. The occurrence of
deformation twinning was revealed by the observation of microtexture using electron backscatter
diffraction (EBSD). A visco-plastic self-consistent (VPSC) polycrystal model was used to simulate
the texture evolution during the uniaxial compression. The texture evolution induced by
crystallographic slip and deformation twinning can be explained by the relative activity of each
deformation modes.
A modified two dimensional (2-D) Monte Carlo (MC) technique was used to simulate primary recrystallization in automotive steels containing fine particles. In order to consider anisotropic properties of grain boundary energy and grain boundary mobility, functions of boundary misorientation were introduced. Orientation-dependent stored energy developed in 80% cold-rolled interstitial free (IF) sheet steel was evaluated by reconstructing of data measured using electron back-scattered diffraction (EBSD) analysis. A subgrain method based on subgrain structure is used for quantitative analysis of the stored energy. The simulation reveals that particles affect evolution of microstructure during recrystallization. The simulation provided a theoretical foundation for understanding effect of particles on the final microstructures and crystallographic textures.
The evolution of hot rolling texture in FCC materials has been simulated numerically using a visco-plastic self-consistent (VPSC) polycrystal model. A finite element (FE) analysis with ABAQUS/StandardTM was conducted to evaluate the deformation gradients during hot rolling deformation. In order to capture crystallographic rotation during hot rolling deformation, an octahedral slip system was considered in a microscopic hardening model. The FE analysis with the VPSC polycrystal simulations successfully predicted the inhomogeneous texture development through the thickness direction in the hot-rolled Al-5wt%Mg alloy sheets.
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