| Abstract: | The objective of the paper is the assessment of the predictive ability of the thermomechanical-microstructural model for the closed-die forging process. The model combines the rigid-plastic flow formulation with the finite element solution of the Fourier equation with the closed-form equations describing processes of recrystallization and grain growth. Experimental validation of the mechanical and thermal components of the model is presented in earlier publications; present work focuses on the microstructural part. Experiment includes closed-die forging of the carbon-manganese steel samples and the measurements of the grain size on the cross-sections of the forgings after the deformation. Spherical samples, which involve significant inhomogeneity of the strain and the temperature fields, have been chosen for a presentation of the results. |
