Fig. 1. Creep curves for K465 superalloy obtained under different constant load conditions: (a) creep strain vs time curve, (b-d) strain rate vs time curves.

Fig. 2. Creep curves for DZ125 superalloy obtained under different constant load conditions: (a) creep strain vs time curve, (b-d) strain rate vs time curves.

Fig. 3. Experimental creep data and the predicted creep curves obtained at 980 °C/220 MPa for DZ125 superalloy using the θi parameters shown in Table 3: (a) predicted by the original model, (b) predicted by the modified model.

Fig. 4. Experimental creep data and the predicted creep curves obtained at 1000 °C/137 MPa for K465 superalloy using the θi parameters shown in Table 6: (a) predicted by the original model, (b) predicted by the modified model.

Fig. 5. Creep curves for K465 superalloy at 950 °C/250 MPa creep condition predicted by the modified θ projection model and the corresponding experimental data.

Fig. 6. Creep curves for DZ125 superalloy under different creep conditions predicted by the modified θ projection model of and the corresponding experimental data: (a) 950 °C/225 MPa, (b) 1050 °C/102 MPa.

Fig. 7. Dislocation evolution during interrupted creep tests under different creep conditions of K465 superalloy: (a) 900 °C/320 MPa, 0.5% creep strain (B=[1$\bar{1}$$\bar{1}$], g=[02$\bar{2}$]), (b) 900 °C/320 MPa, 1.5% creep strain (B=[01$\bar{1}$], g=[111]), (c) 1000 °C/137 MPa, 0.5% creep strain (B=[10$\bar{1}$], g=[1$\bar{1}$1]), (d) 1000 °C/137 MPa, 1.5% creep strain (B=[01$\bar{1}$], g=[111].