Fig. 1. W-Re alloy mixed powder. (a) Microstructure; (b) energy spectrum

Fig. 2. Density of W-Re alloy parts with different laser powers and scanning speeds

Fig. 3. Density of W-Re alloy with different scanning intervals

Fig. 4. Comparison of densities of W-Re alloy and pure W samples with each parameter number under same process parameters

Fig. 5. Vickers hardness under different laser powers and scanning speeds

Fig. 6. Metallographic photos of same scanning speed and different laser powers. (a) P=120 W; (b) P=160 W; (c) P=180 W

Fig. 7. Comparison of Vickers hardness of samples with different parameter numbers of pure W and W-Re alloy parts under same process parameters

Fig. 8. Experimental results. (a) XRD pattern of selective laser melting of W-Re alloy samples and pure W samples at different laser powers; (b) partial enlarged view; (c) XRD pattern of W-Re powder

Fig. 9. Metallographic photos. (a) P=120 W, v=200 mm/s; (b) P=190 W, v=600 mm/s

Fig. 10. Metallographic photos of different laser powers. (a) P=120 W; (b) P=140 W

Fig. 11. Microcracks observed by SEM. (a) W-Re alloy P=180 W, v=400 mm/s; (b) pure W P=180 W, v=600 mm/s