Guanchen Si, Zheng Xiang, Qin Yang, Xianfeng Shen, Jie Chen, Shuke Huang. Effects of Cell Configuration and Micro Defects on Fatigue Properties of NiTi Alloy Lattice Structure Having with Rigidity Prepared by SLM[J]. Laser & Optoelectronics Progress, 2023, 60(21): 2114009
- Laser & Optoelectronics Progress
- Vol. 60, Issue 21, 2114009 (2023)
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
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