While the relationships between processing, structure, and properties of solid titanium alloys produced by additive manufacturing have been established, these relationships are less understood for porous materials, particularly those with rough surfaces inherent to L-PBF. For orthopedics applications, porous architecture and surface roughness are desirable for bone growth, and thus optimization of fatigue life despite these inherent fatigue drivers is critical. The present results establishes relationships between post-processing, microstructure, and resulting fatigue properties for gyroid-sheet scaffolds with as-fabricated surfaces. By comparison of known factors driving fatigue behavior, the relative effect of each on normalized fatigue strength was quantified. Normalized compressive fatigue strength of the gyroid-sheet scaffolds which underwent no surface treatments was observed to be > 50%. The result is higher than that seen for tension fatigue of analogous gyroid-sheet scaffolds, or compared to previously reported normalized compressive fatigue strength of strut based scaffolds. The high strength and fatigue resistant behavior of gyroid-sheet scaffolds despite the inherent surface roughness of L-PBF is desirable for biomedical applications.

虽然已经建立了通过增材制造生产的固态钛合金的工艺，结构和性能之间的关系，但对于多孔材料，尤其是那些L固有表面粗糙的材料，这些关系还不太了解。-PBF。对于骨科应用，多孔结构和表面粗糙度对于骨骼生长是理想的，因此尽管存在这些固有的疲劳驱动因素，但优化疲劳寿命至关重要。目前的结果建立了后加工，微观结构和所得到的具有人造表面的螺旋板支架的疲劳性能之间的关系。通过比较驱动疲劳行为的已知因素，可以量化每种因素对归一化疲劳强度的相对影响。未进行任何表面处理的回旋板支架的标准压缩疲劳强度> 50％。结果高于类似的螺旋片状支架的拉伸疲劳，或者与先前报道的基于支撑的支架的归一化压缩疲劳强度相比更高。L -PBF对于生物医学应用是合乎需要的。