Influence Of Stress-strain State On Structure Formation Of Al-TiC Aluminum Composites During Hot Deformation

The article provides the results of the study of the deformation distribution and relative density over the volume of the pore blank during the process of its hot forging in a semi-closed die to produce axisymmetric forgings, as well as the influence of the forging scheme on the phase and structure formation in aluminum composites. The hot forging process was modeled by the finite element method with help of the DEFORM 2D/3D software package. The analysis of the simulation results showed that at the final stage of the process, the strain intensity is almost uniform across the forging volume, with characteristic zones of difficult deformation forming in the upper and lower parts of the cross-section. Experimental studies have shown that, despite the presence of stagnant zones, this hot deformation scheme provides a uniform structure and phase composition of Al-Ti-C composites. The uniformity of the structure and phase composition ensures low anisotropy of properties over the sample volume, and therefore the proposed forging scheme can be used to produce semi-finished products with specified physical and mechanical properties.