Processing, structure, and properties of additively manufactured titanium scaffolds with gyroid-sheet architecture

Accepted

Journal Article (Journal Article)

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.

Full Text

Duke Authors

Cited Authors

  • Kelly, CN; Kahra, C; Maier, HJ; Gall, K

Published Date

  • May 1, 2021

Published In

Volume / Issue

  • 41 /

Electronic International Standard Serial Number (EISSN)

  • 2214-8604

Digital Object Identifier (DOI)

  • 10.1016/j.addma.2021.101916

Citation Source

  • Scopus