Fig. 1 Hot deformation procedure at different compression conditions. Deformation temperatures: 1050-1200 °C with 50 °C interval. Strain rates: 0.01, 0.1, 1, 10 s-1. Deformation true strain: 0.7

Fig. 2 Flow stress plots of experimental specimens

Fig. 3 Relationships between a \(\ln \sigma - \ln \dot{\varepsilon }\), b \(\sigma - \ln \dot{\varepsilon }\), c \(\ln [\sinh (\alpha \sigma )] - \ln \dot{\varepsilon }\), d \(\ln [\sinh (\alpha \sigma )] - {1 \mathord{\left/ {\vphantom {1 T}} \right. \kern-0pt} T}\)

Fig. 4 Relationships between a \(\alpha\), b \(n\), c \(Q\), d \(\ln A\) and true strain

Fig. 5 Comparison between the experimental and predicted flow stress from constitutive equation (considering the compensation of strain) at strain rates of a 0.01 s-1, b 0.1 s-1, c 1 s-1, d 10 s-1

Fig. 6 Correlation between the experimental and predicted flow stress data from the modified constitutive equation

Fig. 7 Relationship between \(\ln \sigma\) and \(\ln \dot{\varepsilon }\) of chosen strains: a \(\varepsilon = 0.3\); b \(\varepsilon = 0.4\); c \(\varepsilon = 0.5\); d \(\varepsilon = 0.6\)

Fig. 8 Processing maps for the experimental TRIP steel at true strains of a 0.3, b 0.4, c 0.5 and d 0.6. The numbers of the contour maps represent percent efficiency of power dissipation. The shaded corresponds to instability area

Fig. 9 OAGBs of specimens deformed at: a 1050 °C, 10 s-1; b 1100 °C, 10 s-1; c 1200 °C, 10 s-1; d 1200 °C, 0.1 s-1; e 1050 °C, 0.01 s-1, f 1200 °C, 0.01 s-1

Fig. 10 Relationship between Ds and Z