Selective laser melting fabrication of body-temperature shape memory NiTi alloy for 4D-printed orthopedic implants
Abstrak
SLM fabrication of NiTi alloy is receiving increasing attention. However, the relatively high austenite transformation finish (Af) temperature is the main problem for biomedical applications. In this study, it was found that phase transformation temperature (PTT) increased with increasing laser power, decreasing scanning speed, and decreasing hatch spacing. The combination of PPs with an energy density of less than 75 J/mm³ is expected to yield the Af temperature below 37 °C. P = 80 W, v = 600 mm/s, and h = 70 μm were identified as the optimal combination because of a good tensile strength of 612 MPa and a peak shape recovery rate of 96.94%. Biocompatibility assessment showed that SLM-NiTi porous scaffolds supported pre-osteoblast survival and proliferation. A patient-specific mesh-like supporting prosthesis was designed to show the prospect of 4D-printed orthopedics implant. In clinical application, SLM-NiTi prosthesis could reduce bony window and facilitate easier insertion through compressive deformation.
Topik & Kata Kunci
Penulis (15)
Zhuangzhuang Li
Minxun Lu
Haoyuan Lei
Shanfang Zou
Ruicheng Liu
Yitian Wang
Jingjunjiao Long
Boqing Zhang
Qi You
Yi Luo
Yong Zhou
Changchun Zhou
Li Min
Yujiang Fan
Chongqi Tu
Akses Cepat
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- 2024
- Sumber Database
- DOAJ
- DOI
- 10.1080/17452759.2024.2413181
- Akses
- Open Access ✓