Fatigue behaviour of titanium scaffolds with hierarchical porosity produced by material extrusion additive manufacturing
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F23%3APU146573" target="_blank" >RIV/00216305:26620/23:PU146573 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0264127522010760" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0264127522010760</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.matdes.2022.111453" target="_blank" >10.1016/j.matdes.2022.111453</a>
Alternative languages
Result language
angličtina
Original language name
Fatigue behaviour of titanium scaffolds with hierarchical porosity produced by material extrusion additive manufacturing
Original language description
Metallic porous structures (scaffolds) produced by additive manufacturing represent an important class of personalised implants used in load-bearing orthopaedic applications. As such, their fatigue performance must be excellent to prevent the need for revision surgery. This paper provides insight into the high-cycle fatigue behaviour of novel titanium scaffolds with hierarchical porosity and properties comparable to those of human bone that were produced by direct ink writing (DIW) and tested under cyclic loading typical for bone implants. Opposite to traditional expectations in the field of metal fatigue, scaffolds produced with an open intrastrand pore network (14.3%) endured nearly an order of magnitude more cycles than those with relatively compact strands (5.9%) and their normalized fatigue strength (62% of their yield strength in one milion cycles) was competitive with many current titanium scaffolds produced by other additive manufacturing technologies. Improved fatigue performance was related to fatigue crack growth shielding effects that reduced the crack growth rate, prolonged the crack path, and increased energy absorption. Consequently, these novel hierarchically porous titanium structures prepared by DIW can serve safely under cyclic loading conditions, and at the same time can provide multiple open porosity-related functionalities in advanced biomedicine and other industrial sectors.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20501 - Materials engineering
Result continuities
Project
<a href="/en/project/LTAIN19112" target="_blank" >LTAIN19112: Development of high strength and low young’s modulus, bioactive and antibacterial porous titanium structures for orthopaedic implants</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2023
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
225
Issue of the periodical within the volume
1
Country of publishing house
GB - UNITED KINGDOM
Number of pages
11
Pages from-to
1-11
UT code for WoS article
000908055300009
EID of the result in the Scopus database
2-s2.0-85143881396