TY - JOUR N2 - The high-temperature deformation process and dynamic recrystallization (DRX) process of 21-4N were investigated under the conditions of the deformation temperature range of 1273~1453K, the strain rate range of 0.01~10s–1 and the deformation degree of 60% (the total deformation is 0.916) by using Gleeble-1500D thermal simulated test machine. The curves of stress-strain (σ – ε) were obtained, and the curves of work hardening rate (θ) and strain (ε) were obtained by taking derivative of σ – ε. The DRX critical strains under different conditions were determined by the curves of work hardening rate (θ – ε), and the DRX critical strain model was established. The peak strains of 21-4N were obtained by the curves of σ – ε, the relationship between peak stress (σp) and critical strain (εc) was determined, and the peak strain model was established. The DRX volume fraction models of 21-4N were established by using Avrami equation. The DRX grain size of 21-4N was calculated by Image Pro Plus 6.0, and its DRX grain size models were established. L1 - http://journals.pan.pl/Content/117799/PDF/AMM-2021-1-19-Hongchao%20Ji.pdf L2 - http://journals.pan.pl/Content/117799 PY - 2021 IS - No 1 EP - 152 DO - 10.24425/amm.2021.134770 KW - 21-4N KW - hot deformation KW - dynamic recrystallization KW - critical strain KW - volume fraction A1 - Li, Yiming A1 - Huang, Xiaomin A1 - Ji, Hongchao A1 - Li, Yaogang A1 - Wang, Baoyu A1 - Tang, Xuefeng PB - Institute of Metallurgy and Materials Science of Polish Academy of Sciences PB - Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences VL - vol. 66 DA - 2020.12.22 T1 - Study on Dynamic Recrystallization Models of 21-4N Heat Resistant Steel SP - 145 UR - http://journals.pan.pl/dlibra/publication/edition/117799 T2 - Archives of Metallurgy and Materials ER -