A model for construction of efficiency and stability maps of hot working processes in polycrystalline metallic materials using the Garofalo's equation

Abstract

Has been developed a fast and easy method for to evaluate the efficiency of the process and some of possible stabilities situations in the hot working process for the pollicrystaline metallic materials (p.m.m.), by the obtained dates in the Garofalo's equation resolution for the steady state creep and for wide ranges of the work variables, stress, strain rate and temperature. These method use the fitting parameters obtained for the equation mentioned and of their physical meaning. Has been developed the numerical treatment from our previously developed "software" for the analysis of "creep", and we can obtained the efficiency energetic maps for the "creep" and the more generally advises areas for the hot working. Furthermore has been obtained maps for parameters of great physical significance; f.e. the effective activation energy for different areas of the materials hot working, and in addition has been developed a method for obtained the values of {n_PL} for the different ranges of "power-law" application, when has been obtained the value of {n_G} in the Garofalo's equation.