Fig. 1 FE model for cylindrical compression

Fig. 2 Variation of the effective strain for e1–e8 elements and of the pre-set one for the sample of 12-mm height with the friction coefficient f = 0.1 a, f = 0.3 b

Fig. 3 Variation of the effective strain for e1–e8 elements and of the pre-set one for the sample with the heights of 8 mm a, 16 mm b as the friction coefficient f = 0.3

Fig. 4 Variation of ?ε between the effective strains of element e7 and the pre-set ones of the samples with the heights of 12 mm a, 16 mm b as the friction coefficient in the range of 0.1–0.3

Fig. 5 Variation of ?ε between the effective strains of element e7 and the pre-set ones of the samples with the heights of 8–16 mm as the friction coefficient f = 0.1 a, f = 0.3 b

Fig. 6 ?ε of element e7 for the samples deformed at (pre-set) strains of 0.3 a, 0.6 b as the friction coefficient is 0.1–0.3

Fig. 7 Electric spark cutting for the deformed samples

Fig. 8 The compressive true stress–strain curve for Fe–Ni–Cr alloy GH4033 at 950 °C and 1.0 s-1

Fig. 9 Optical micrographs of Fe–Ni–Cr alloy GH4033 superalloy deformed at strain of 0.6 showing the dynamically recovered microstructure a, the dynamically recrystallized microstructure b

Fig. 10 True stress–strain curve for Fe–Ni–Cr superalloy GH4033 at 1,150 °C and 0.1 s-1

Fig. 11 Optical micrographs of Fe–Ni–Cr superalloy GH4033 at different positions of the deformed samples at strains of 0.18 a, c, 0.6 b, d