Three-point bending fatigue behaviour of DIW-printed microporous titanium filaments for orthopaedic lattices
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F26%3A0201723" target="_blank" >RIV/00216305:26620/26:0201723 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0264127526002728" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0264127526002728</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.matdes.2026.115699" target="_blank" >10.1016/j.matdes.2026.115699</a>
Alternative languages
Result language
angličtina
Original language name
Three-point bending fatigue behaviour of DIW-printed microporous titanium filaments for orthopaedic lattices
Original language description
This study reports fatigue data on microporous titanium (Ti) filaments fabricated by direct ink writing (DIW) for orthopaedic applications. Compact (∼6% closed-pore-dominated) and porous (∼15% open-pore-dominated) variants were tested under three-point bending fatigue. Fractography and elastoplastic finite element analysis (FEA) were used to relate surface roughness and microporosity to crack path and local surface stress–strain fields. FEA showed equivalent plastic strain concentrated at surface valleys, with maximum values up to ∼50% higher in porous than in compact filaments, consistent with earlier fatigue crack initiation. Fractography revealed pronounced crack deflection and branching in the porous filaments, induced by an interconnected micropore network, increasing crack-path tortuosity and thereby slowing long-crack (Stage II) propagation. Consequently, porous filaments tended to show higher low-cycle fatigue resistance, whereas high-cycle fatigue lives were comparable between the two filament variants. These filament-scale findings complement lattice-scale observations in which porous lattices exhibit superior overall fatigue resistance, reflecting the dominance of long-crack propagation at that scale. The results highlight the promise of DIW Ti with tailored open microporosity for load-bearing implants.
Czech name
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Czech description
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Classification
Type
J<sub>SC</sub> - Article in a specialist periodical, which is included in the SCOPUS database
CEP classification
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OECD FORD branch
20501 - Materials engineering
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2026
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Materials & Design
ISSN
0264-1275
e-ISSN
1873-4197
Volume of the periodical
264
Issue of the periodical within the volume
April
Country of publishing house
GB - UNITED KINGDOM
Number of pages
9
Pages from-to
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UT code for WoS article
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EID of the result in the Scopus database
2-s2.0-105032189201