Three-point bending fatigue behaviour of DIW-printed microporous titanium filaments for orthopaedic lattices

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Three-point bending fatigue behaviour of DIW-printed microporous titanium filaments for orthopaedic lattices

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Three-point bending fatigue behaviour of DIW-printed microporous titanium filaments for orthopaedic lattices

Popis výsledku anglicky

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.

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2026

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Materials & Design

ISSN

0264-1275

e-ISSN

1873-4197

Svazek periodika

264

Číslo periodika v rámci svazku

April

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

—

Kód UT WoS článku

—

EID výsledku v databázi Scopus

2-s2.0-105032189201