Fig. 1. Test results. (a) Powder SEM image; (b) size distribution statistics of powder particle; (c) SLM scanning strategy; (d) SLM process flow; (e) diagram of specimens with different build directions; (f) size of tensile specimens

Fig. 2. Microhardness values of all specimens. (a) 750 ℃; (b) 850 ℃; (c) 950 ℃

Fig. 3. Engineering stress-strain curve of all specimens. (a) 0°; (b) 45°; (c) 90°

Fig. 4. Elongation-ultimate tensile strength-yield strength of all specimens. (a) 0°; (b) 45°; (c) 90°

Fig. 5. Microscopic photograph of tensile fracture micrographs of AB specimens. (a) 0°; (b) 45°; (c) 90°

Fig. 6. Microscopic photograph of tensile fracture micrographs of HT7 specimens. (a) 0°; (b) 45°; (c) 90°

Fig. 7. Microscopic morphology images of AB specimens. (a) 0°; (b) 45°; (c) 90°

Fig. 8. Microscopic morphology images of HT7 specimens. (a) 0°; (b) 45°; (c) 90°

Fig. 9. EBSD pole and IPF maps of AB specimens. (a) 0°; (b) 45°; (c) 90°

Fig. 10. EBSD pole and IPF maps of HT7 specimens. (a) 0°; (b) 45°; (c) 90°

Fig. 11. Distribution of grain boundaries, phase maps, and distribution of grain size for AB specimens. (a) 0°; (b) 45°; (c) 90°

Fig. 12. Distribution of grain boundaries, phase maps, and distribution of grain size for HT7 specimens. (a) 0°; (b) 45°; (c) 90°

Fig. 13. Schematic of microstructure evolution mechanism of SLMed specimens in annealing heat treatment. (a) AB specimen; (b) HT7 specimen

Fig. 14. Dislocation density of AB specimens. (a) 0°; (b) 45°; (c) 90°

Fig. 15. Dislocation density of HT7 specimens. (a) 0°; (b) 45°; (c) 90°

Fig. 16. Grain orientation spread map of AB specimens. (a) 0°; (b) 45°; (c) 90°

Fig. 17. Grain orientation spread map of HT7 specimens. (a) 0°; (b) 45°; (c) 90°