Fig. 1 XRD pattern of MoNbTaTiVSi refractory high-entropy alloy composite

Fig. 2 Microstructure of MoNbTaTiVSi refractory high-entropy alloy composite after 1200 °C annealing: a BSE image at lower magnification, b BSE image of eutectic area at higher magnification, c HADDF image of eutectic area, d EDS mapping of b, e and g HR image of the BCC phase and the Ti5Si3 phase, f and h SAED patterns of the BCC phase and the Ti5Si3 phase

Fig. 3 a Engineering stress-strain curves tested at room temperature, 800 °C, 1000 °C and 1200 °C, b temperature dependence of specific yield stress for refractory HEAs [2,19,36,37,38,39,40,41,42,43,44]

Fig. 4 Microstructures of the composite after 1200 °C compression test with the strain at 0.5: a BSE image, b HADDF image of eutectic area, c BF image of the same area of b, d BF image for the example of LAGBs surrounded dislocation cell in the Ti5Si3 phase, e BF image for the example of bulging grain boundaries in the Ti5Si3 phase. The yellow circles mark the nuclei of dynamic recrystallized BCC phase

Fig. 5 a, c-f BF images of dislocations A and B under different operation reflections for Burgers vectors analysis, b HR image of dislocation B

Fig. 6 EBSD results of HD10 and HD50 compression specimen: a, e IPF maps, b, f phase maps, c,g pole figures of the BCC phase, d, h pole figures of the Ti5Si3 phase

Fig. 7 a-g Recrystallized fraction maps for HD 10 and HD50, a, e whole detected area, b, f BCC phases, c, g Ti5Si3 phases, d, h strain contouring maps for HD 10 and HD50

Fig. 8 Detail of selected eutectic area as indicated by black frames in Fig. 7(d, h), a, b recrystallized fraction maps, e, g phase maps, f, h local misorientation maps, i, j band contrast map blended with grain boundary map

Fig. 9 Grain boundary misorientation distribution of BCC phase and the Ti5Si3 phase in HD10 and HD50

Fig. 10 a Recrystallized fraction corresponding to the data in Figs. 7 and 8, b fraction of LAGB, MAGB and HAGB corresponding to the data in Fig. 9