Fig. 1. QCr0.8 powder used in experiment. (a) Morphology; (b) particle-size distribution

Fig. 2. Density of SLM QCr0.8 versus scanning speed under different hatching spaces

Fig. 3. OM images of SLM QCr0.8 samples under different scanning speeds at hatching space of 0.20 mm. (a) 200 mm/s; (b) 400 mm/s; (c) 600 mm/s; (d) 800 mm/s; (e) 1000 mm/s; (f) 1200 mm/s

Fig. 4. Influence of hatching space on relative density under different scanning speeds

Fig. 5. Schematics of pore formation under different hatching spaces. (a) Appropriate hatching space; (b) small hatching space；(c) large hatching space

Fig. 6. XRD patterns of QCr0.8 alloy in different states. (a) Whole map; (b) local map

Fig. 7. Typical microstructures of SLM QCr0.8 sample. (a) XOZ plane; (b) XOY plane

Fig. 8. Microstructure of annealed QCr0.8 alloy after forging. (a) Under low magnification optical microscope; (b) under high magnification optical microscope

Fig. 9. SEM images of SLM QCr0.8 alloy sample. (a)(b) XOY plane; (c)(d) XOZ plane

Fig. 10. FTEM images of SLM QCr0.8 alloy. (a) Bright-field image under low magnification; (b) bright-field image under high magnification; (c) HRTEM image; (d) FFT image

Fig. 11. Stress-strain curves of SLM QCr0.8 alloy sample in horizontal direction and aged sample

Fig. 12. Fracture morphologies of SLM QCr0.8 alloy tensile sample. (a) As-deposited, low magnification; (b) as-deposited, high magnification; (c) aged, low magnification; (d) aged, high magnification

Fig. 13. SLM QCr0.8 part with complex inner channels