Fig. 1. Schematic of scanning strategy for selective laser melting

Fig. 2. Sketch map of tensile samples and compact tensile specimens

Fig. 3. Microstructures of annealed alloy. (a) Parallel to building direction; (b) perpendicular to building direction

Fig. 4. SEM morphologies of annealed alloy. (a) Parallel to building direction; (b) perpendicular to building direction

Fig. 5. Grain morphology and grain boundary distribution of annealed alloy. (a) Grain morphology parallel to building direction; (b) grain morphology perpendicular to building direction; (c) grain boundary distribution parallel to building direction; (d) grain boundary distribution perpendicular to building direction

Fig. 6. Load versus crack opening displacement curves of compact tensile specimens with different opening directions. (a) X-Y; (b) Y-Z; (c) Z-Y

Fig. 7. Fracture graphs of over-load zone for compact tension specimens with different opening directions. (a)(d) X-Y; (b)(e) Y-Z; (c)(f) Z-Y

Table 1. Calculation parameters of fracture toughness for compact tensile specimens with different opening directions

Table 2. Test results of compact tensile specimens with different opening directions