Fig. 1. Diagrams of Split Hopkinson Pressure Bar (SHPB) and high-speed hydraulic servo material testing machines.

Fig. 2. As cast metallographic micrographs of the Cu-2Ag (a), Cu-4Ag (b) and Cu-20Ag (c-d) alloys.

Fig. 3. SEM micrographs of Cu-20Ag alloy (a), (b) and (e); EDS analysis of Cu and Ag elements (c), (d), (f) and (g).

Fig. 4. True stress-true strain curve and yield strength (with error bars) of Cu-20Ag alloy with different strain rates under the high speed hydraulic servo material testing machine and SHPB.

Fig. 5. Microstructure of Cu-20Ag alloy deformed at different strain rates: (a) 10 s-1; (b) 100 s-1; (c) 500 s-1; (d) 3000 s-1.

Fig. 6. EDS mappings of the main alloying elements in Cu-20Ag alloy deformed at 500 s-1 (a) and 3000 s-1 (b).

Fig. 7. TEM micrographs of Cu-20Ag alloy after multi pass drawing and annealing: (a-b) bright fields that reveal the deformation bands and seldom twins; (c) FFT of twins in (b); (d) HRTEM twins; (e) HRTEM of Cu-Ag interface; (f) FFT of the interface in (e); (g) crystal plane spacing of Cu and Ag.

Fig. 8. Bright field micrographs of Cu-20Ag alloy deformed at 500 s-1.

Fig. 9. TEM micrographs of Cu-20Ag alloy deformed at 500 s-1: (a), (c) bright field images; (b) EDS analysis of (a); (d) magnification images of (c); (e) FFT of yellow hexagon in (d); (f) FFT of blue pentagram.

Fig. 10. TEM micrographs of Cu-20Ag alloy deformed at 3000 s-1: (a-d) bright field images; (e) magnification images of (d); (f) FFT of blue rectangle in (e); (g) EDS analysis of (c).

Fig. 11. TEM micrographs of Cu-20Ag alloy deformed at 3000 s-1: (a-b) deformed twins given by bright field and HRTEM; (c-d) bright filed and dark field that revealing the distribution of Ag in the matrix; (e) the percent of Cu and Ag in 1 and 2 regions, respectively; (f) FFT of (c); (g-f) the bright field and HRTEM of Cu-Ag interfaces; (j) FFT of Cu-Ag interface in (h).

Fig. 12. The strain distributions with three different directions of Cu-20Ag alloy at different states: (a) Cu matrix at original state; (b) Cu matrix deformed at 3000 s-1; (c) Ag deformed at 3000 s-1.

Fig. 13. Lattice image of the Cu and Ag in the as-recieved specimen (a-d) HRTEM image; (a1-a3) (111)F, ${{(1\bar{1}\bar{1})}_{F}}$ and (200)F; (b1-b3) (111)F, ${{(\bar{2}00)}_{F}}$ and ${{(\bar{1}11)}_{F}}$ ; (c1-c3) (111)F, ${{(\bar{2}00)}_{F}}$ and ${{(\bar{1}11)}_{F}}$ and (d1-d3) (111)F, ${{(\bar{2}00)}_{F}}$ and ${{(\bar{1}11)}_{F}}$ lattice fringes obtained by filtering.