Fracture Surface Roughness of Ti-Scaffold Filaments with Different Microporosity

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F26%3A0201461" target="_blank" >RIV/00216305:26210/26:0201461 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S2452321625005268" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2452321625005268</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.prostr.2025.10.031" target="_blank" >10.1016/j.prostr.2025.10.031</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Fracture Surface Roughness of Ti-Scaffold Filaments with Different Microporosity

Popis výsledku v původním jazyce

implants. The previous research has shown that the titanium scaffolds with porous filaments (14% microporosity) exhibited better fatigue resistance than those with compact filaments (6% microporosity). This was primarily attributed to fatigue crack growth shielding mechanisms induced by crack-pore interactions and by an extension of fatigue crack path in the porous filaments. A quantification of these effects demands a determination of fracture surface roughness parameters of both types of filaments, which is the main aim of this article. Selected roughness parameters Sa (arithmetical mean height), Sv (maximum valley depth) and Sdr (developed interfacial area ratio) of fracture surfaces of scaffold filaments after cyclic three-point bending tests were determined using the confocal laser microscope Olympus LEXT™ OLS5100 according to ISO 25178. Each sample was subjected to 7 measurements on small surfaces of size 4500 μm2 spread over the fatigue fracture surface and the average value with the standard deviation was computed. All the average values of roughness parameters for the porous samples were found to be higher than those for the compound fibers. These parameters decreased with an increasing number of cycles to fracture Nf in the range Nf ϵ (102, 105). The statistical analysis of fracture surface roughness will serve as a benchmark for a currently developed model of the fatigue crack growth in metallic materials of variable porosity which will improve our understanding the mechanistic response of scaffolds and enable the optimization of their microporosity.

Název v anglickém jazyce

Fracture Surface Roughness of Ti-Scaffold Filaments with Different Microporosity

Popis výsledku anglicky

implants. The previous research has shown that the titanium scaffolds with porous filaments (14% microporosity) exhibited better fatigue resistance than those with compact filaments (6% microporosity). This was primarily attributed to fatigue crack growth shielding mechanisms induced by crack-pore interactions and by an extension of fatigue crack path in the porous filaments. A quantification of these effects demands a determination of fracture surface roughness parameters of both types of filaments, which is the main aim of this article. Selected roughness parameters Sa (arithmetical mean height), Sv (maximum valley depth) and Sdr (developed interfacial area ratio) of fracture surfaces of scaffold filaments after cyclic three-point bending tests were determined using the confocal laser microscope Olympus LEXT™ OLS5100 according to ISO 25178. Each sample was subjected to 7 measurements on small surfaces of size 4500 μm2 spread over the fatigue fracture surface and the average value with the standard deviation was computed. All the average values of roughness parameters for the porous samples were found to be higher than those for the compound fibers. These parameters decreased with an increasing number of cycles to fracture Nf in the range Nf ϵ (102, 105). The statistical analysis of fracture surface roughness will serve as a benchmark for a currently developed model of the fatigue crack growth in metallic materials of variable porosity which will improve our understanding the mechanistic response of scaffolds and enable the optimization of their microporosity.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/GA23-07879S" target="_blank" >GA23-07879S: Výzkum vlivu nitridace na únavové chování aditivně vyrobených titanových hierarchických porézních struktur</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název statě ve sborníku

Materials Structure & Micromechanics of Fracture (MSMF11)

ISBN

—

ISSN

—

e-ISSN

2452-3216

Počet stran výsledku

6

Strana od-do

38-43

Název nakladatele

Elsevier

Místo vydání

—

Místo konání akce

25.06.2025

Datum konání akce

23. 6. 2025

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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