Abstract
This work provides a selective strategy to determine structure shape and fatigue life suitable for implanted scaffolds, meeting the demands of long-term bone implantation. Scaffolds were designed by a novel mathematical method and fabricated by additive manufacturing EBM using Ti-6Al-4V. The failure mechanism of the scaffolds under high cycle fatigue was revealed by Micro-CT, FEA and SEM, which ensures the scaffolds have fatigue life >106 at stress level of 0.2. It was found scaffolds with larger unite size help to decrease notch sites for crack initiation, resulting in the improvement of fatigue life without reducing the porosity of scaffolds.
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