This paper reports a study on the prediction of density change in powder metallurgy by FEM analysis. In this study, an analytical method was developed based on load-stroke diagrams of cylinder-shaped specimens obtained from experiments for compaction and cold forging, to generate true stress-strain diagrams considering porous materials for use in FEM analysis of compaction and cold forging of sintered steel. Then, FEM analysis of the compacting of a sprocket-shaped compact was conducted using the created true stress true strain diagram, and the density change was predicted and compared with the experimental data. Load-stroke diagrams were also compared with experimental data.
IGUCHI et al. (2025) studied this question.