This research demonstrates flow behavior and microstructural changes during isothermal compression of high-chromium cast steel, indicating optimal thermomechanical processing conditions.
This research elucidates the high-temperature deformation mechanisms in high-chromium cast steel through integrated constitutive analysis and microstructural characterization across thermomechanical processing conditions (1,150–1,250°C, 0.001–0.1 s −1 ). The developed strain-compensated Arrhenius-type constitutive equation exhibits remarkable predictive capability for flow behavior, with deformation activation energy displaying fourth-order polynomial correlation with true strain. Processing map methodology identifies a stable processing domain (1,190–1,240°C, 0.001–0.005 s −1 ) characterized by maximum energy dissipation efficiency. Electron backscatter diffraction analysis demonstrates that under optimal deformation parameters (1,200°C, 0.001 s −1 ), high-chromium cast steel yields a fine-grained microstructure with 92.2% recrystallization fraction. Additionally, discontinuous dynamic recrystallization nucleation predominantly occurs via subgrain merging and boundary protrusion mechanisms.
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Li et al. (2025) studied this question.