Details
| Original language | English |
|---|---|
| Article number | 101916 |
| Journal | Additive Manufacturing |
| Volume | 41 |
| Early online date | 16 Feb 2021 |
| Publication status | Published - May 2021 |
Abstract
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.
Keywords
- Additive manufacturing, Fatigue, Laser powder bed fusion, Titanium alloy
ASJC Scopus subject areas
- Engineering(all)
- Biomedical Engineering
- Materials Science(all)
- General Materials Science
- Engineering(all)
- Engineering (miscellaneous)
- Engineering(all)
- Industrial and Manufacturing Engineering
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In: Additive Manufacturing, Vol. 41, 101916, 05.2021.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Processing, structure, and properties of additively manufactured titanium scaffolds with gyroid-sheet architecture
AU - Kelly, Cambre N.
AU - Kahra, C.
AU - Maier, Hans J.
AU - Gall, Ken
N1 - Funding Information: Financial support from the German Research Foundation (grant MA 1175/67-1 ) is gratefully acknowledged. The authors also thank J. Baden, A. Krabbenhöft and S. Julmi for help with the microstructural characterization.
PY - 2021/5
Y1 - 2021/5
N2 - 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.
AB - 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.
KW - Additive manufacturing
KW - Fatigue
KW - Laser powder bed fusion
KW - Titanium alloy
UR - http://www.scopus.com/inward/record.url?scp=85103693791&partnerID=8YFLogxK
U2 - 10.1016/j.addma.2021.101916
DO - 10.1016/j.addma.2021.101916
M3 - Article
AN - SCOPUS:85103693791
VL - 41
JO - Additive Manufacturing
JF - Additive Manufacturing
M1 - 101916
ER -