Some aspects of workability studies on hot forging of sintered high strength 4% titanium carbide composite steel preforms

The aim of the paper is the study of workability of Fe–1.0% C–4% TiC steel composite during hot upsetting. Ductile fracture is the most common failure acting in bulk forming process. The formability during hot upsetting depends on the temperature, strain and strain rate. A complete experimental investigation of the workability behaviour of Fe–1.0% C–4% TiC steel composite was performed under the triaxial stress state condition. Hot upsetting of Fe–1.0% C–4% TiC steel composite preforms was carried out at a temperature of 1120 °C and the formability behaviour of the same at triaxial stress state condition was determined. The curves plotted for different preforms were analysed and the relationship between the axial strain and the formability stress index were obtained. A relationship between the relative density and the axial strain was also established. A particular attempt was made to relate the various stress ratio parameters, namely, (σθ/σeff), (σm/σeff) and (σz/σeff) with the relative density.