Analysis of hot forging of porous metals

Thermomechanical elastoplastic problems in hot forging of the porous metals have been analysed using the thermoelastoplastic finite element method. This finite element program has been formulated using the yield condition advanced by Lee and Kim and developed using the thermoelastoplastic time integration procedure. A hardening law of non-porous metals as a function of temperature, plastic strain and strain rate is proposed. The thermal and thermoelastic properties of porous metals, which are dependent on the relative density and the corresponding properties of the non-porous base metal, are used in finite element calculations. Thermomechanical response and densification behaviour of the porous metals during hot forging have been calculated at various initial relative densities, strain rates and temperatures. The calculated results are in good agreement with experimental data.