Deformation Behavior of Selectively Heated Powder Metallurgical Composites under Compression

Abstract This work investigates the deformation behavior of porous specimens under different conditions during upsetting. The preforms were prepared through a powder metallurgy technique for various amounts of titanium, such as 2 %, 4 %, and 6 % in the aluminum under different percentages of initial relative densities, like 80 %, 85 %, and 90 %, with one aspect ratio by suitable loads. The sequence of compression tests was conducted at room temperature and various forming parameters were determined. The metal flow was investigated using the DEFORM-2D tool at different step numbers, and we observed that the flow of metal started from the head surface to the equatorial surface, and fracture arose in the outer sectors of the specimen due to the higher stresses and the lower density. Therefore, the deformation behavior of the component was affected. This work is intended to increase the forming characteristics of the produced preforms by adopting the selective heating mechanism at the equatorial zones of the deformed specimen. Heating selectively at the damaged place of the samples could increase the true strain, decrease the true stress, increase the densification, increase the damage parameter, and increase the grain size of the components due to releasing stresses, materials softening, dynamic recrystallization, reduction of porosity amount, and change in microstructure.