Fig. 1 Hot compression deformation and observation surface

Fig. 2 Microstructures of as-homogenized Mg-9Gd-4Y-2Zn-0.5Zr: a and b SEM images of block shape LPSO and lamellar LPSO; c, d HAADF images and SAED pattern of the lamellar LPSO

Fig. 3 EBSD of the as-homogenized alloy: a inverse pole figure (IPF) coloring map; b PFs

Fig. 4 True stress-strain curves of the samples compressed at 450 °C and 0.01 s−1

Fig. 5 Optical microstructure of the samples at the different compression strains: a, b ε = 0.1; c, d ε = 0.3; e, f ε = 0.5; g, h ε = 0.7; i, j ε = 1.4

Fig. 6 SEM microstructures of the samples at the different compression strains: a, b ε = 0.1; c, d ε = 0.3; e, f ε = 0.5; g, h ε = 0.7; i, j ε = 1.4

Fig. 7 a TEM-BF image of the particle phase; b SAED patterns of the particle phase

Fig. 8 Schematic diagram in the process of compression deformation

Fig. 9 IPF coloring map of the samples at the different compression strains: a ε = 0.1; b ε = 0.3; c ε = 0.5; d ε = 0.7; e ε = 1.4

Fig. 10 Misorientation angle distribution of the compression alloy at different strains: a ε = 0; b ε = 0.1; c ε = 0.3; d ε = 0.5; e ε = 0.7; f ε = 1.4

Fig. 11 Average grain size images at different compression strains of compression alloy: a ε = 0.1; b ε = 0.3; c ε = 0.5; d ε = 0.7; e ε = 1.4

Fig. 12 IPFs and PFs of compression alloy after different strains: a, f ε = 0.1; b, g ε = 0.3; c, h ε = 0.5; d, i ε = 0.7; e, j ε = 1.4

Fig. 13 The {0001} PF of the samples at different strains: a ε = 0.1; b ε = 0.3; c ε = 0.5; d ε = 0.7; e ε = 1.4

Fig. 14 SF distribution maps of the compression sample at different strains

Fig. 15 DRX behavior of the selected region E in Fig. 9e. a IPF coloring map of recrystallized grains distributed around the phase; b (0001) PF corresponding to region E; c SEM-BSE image corresponding to region E

Fig. 16 DRX behavior of the selected region A in Fig. 9b: a optical microstructure image of particle phase; b and c IQ map and IPF coloring map corresponding to region A; d (0001) PF corresponding to region A

Fig. 17 a HAADF-STEM image of Zr-Zn phase, b-f TEM mapping of elements Mg, Gd, Y, Zn and Zr from the Zr-Zn phase

Fig. 18 DRX behavior of the selected region C in Fig. 9c: a IPF coloring map of region C; b (0001) PF corresponding to region C; c Kernel average misorientation map of region C

Fig. 19 DRX behavior of the selected region D in Fig. 9c: a IPF map of region D; b (0001) PF map corresponding to region D; c KAM map of region D; d the contour line of misorientation angle along the arrows AB in a

Fig. 20 DRX behavior of the selected region F in Fig. 9e: a optical microstructure image of DRX between lamellar phases; b, c IQ map and IPF coloring map corresponding to region F

Fig. 21 DRX behavior of the selected region B in Fig. 9b: a optical microstructure image of LPSO phase cutting coarse grain; b and c IQ map and IPF coloring map corresponding to region B; d (0001) PF corresponding to region B