Fig. 1. Schematic diagram of SLM TC4 sample forming method and size. (a) Schematic of horizontal specimen；(b) schematic of vertical specimen; (c) physical drawing of horizontal forming; (d) physical drawing of vertical forming

Fig. 2. Macro morphology of SLM TC4. (a) SLM-V; (b) SLM-H

Fig. 3. Images of low-magnification microstructure of SLM TC4 deposited state and different heat treatment processes. (a) As-deposited; (b) HM1; (c) HM2; (d) HM3

Fig. 4. SEM images of low-magnification microstructure of SLM TC4 deposited state and different heat treatment processes. (a) As-deposited; (b) HM1; (c) HM2; (d) HM3

Fig. 5. Anisotropic histogram of microstructure in deposited state and different heat treatment processes

Fig. 6. Tensile stress state of grain boundaries in different directions and crack propagation path diagram. (a) SLM-H；(b) SLM-V; (c) schematic diagram of crack propagation pathin deposited state and after heat treatment

Fig. 7. Tensile fracture morphology of SLM TC4 in deposited state. (a) SLM-H(×80); (b) SLM-H(×2000); (c) SLM-H(×5000); (d) SLM-V (×80); (e) SLM-V(×2000); (f) SLM-V(×5000)

Fig. 8. Topography of the tensile fracture of different heat treatment processes. (a) HM1-H(×80); (b) HM1-H(×2000); (c) HM1-V(×80); (d) HM1-V(×2000); (e) HM2-H(×80); (f) HM2-H(×2000); (g) HM2-V(×80); (h) HM2-V(×2000); (i) HM3-H(×80); (j) HM3-H(×2000); (k) HM3-V(×80); (l) HM3-V(×2000)