Fig. 1. Unit cell and structure models for BCCZ, FCCZ, and FBCCZ

Fig. 2. NiTi alloy powder. (a) Microscopic image; (b) particle size distribution

Fig. 3. NiTi alloy lattice structure

Fig. 4. Material properties and boundary condition used in simulation^[24]. (a) Tensile data for SLM NiTi material; (b) boundary conditions

Fig. 5. Compression test results of BCCZ, FBCCZ, and FCCZ structures. (a) Stress-strain curves; (b) yield stress and elastic modulus

Fig. 6. Fatigue test results of BCCZ, FBCCZ, and FCCZ structures. (a) Absolute fatigue life curves; (b) normalized fatigue life curves

Fig. 7. Morphologies of three structures after fatigue failure. (a) BCCZ; (b) FCCZ; (c) FBCCZ

Fig. 8. Cracks generated at the pillar nodes after fatigue failure of three structures. (a) BCCZ; (b) FCCZ; (c) FBCCZ

Fig. 9. Pore distribution and pore morphology. (a) BCCZ; (b) FCCZ; (c) FBCCZ

Fig. 10. Statistics of hole defects. (a) Diameter distribution of hole defects; (b) volume fraction of hole defects

Fig. 11. Simulation results of three structures under 30 MPa stress. (a) BCCZ; (b) FCCZ ; (c) FBCCZ

Fig. 12. Simulation results of three structures under 15 MPa stress. (a) BCCZ; (b) FCCZ ; (c) FBCCZ

Fig. 13. SEM of fracture after fatigue failure under low stress. (a) BCCZ; (b) FCCZ; (c) FBCCZ