Fatigue performance of hierarchically porous titanium scaffolds produced by additive manufacturing and its possible improvement by gas nitriding

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F23%3APU151392" target="_blank" >RIV/00216305:26620/23:PU151392 - isvavai.cz</a>
Result on the web
<a href="https://iopscience.iop.org/article/10.1088/1742-6596/2692/1/012044" target="_blank" >https://iopscience.iop.org/article/10.1088/1742-6596/2692/1/012044</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1742-6596/2692/1/012044" target="_blank" >10.1088/1742-6596/2692/1/012044</a>

Result language
angličtina
Original language name
Fatigue performance of hierarchically porous titanium scaffolds produced by additive manufacturing and its possible improvement by gas nitriding
Original language description
This contribution focuses on the nitriding of hierarchically porous titanium scaffolds to enhance their fatigue behaviour. Firstly, recent experimental findings that demonstrate the benefits of intra-filament porosity in improving fatigue resistance are discussed, providing details on crack growth shielding micromechanisms. Subsequently, the study explores the application of titanium scaffolds nitriding as a promising technique to prolong fatigue crack initiation. The scaffolds, prepared using the direct ink writing method with intra-filament porosity of similar to 6% and inter-filament porosity of similar to 68%, underwent gas nitriding at 1100 degrees C for 2 h. This process resulted in the formation of a consistent 42 mu m thick nitriding case across the entire structure. Preliminary experiments showed a minimal decrease in fatigue strength within the low cycle fatigue region, attributed to the fracturing of a thick brittle compound zone under high applied loading. These results suggest that nitriding has the potential to improve fatigue performance after process optimization.
Czech name
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Czech description
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Project
<a href="/en/project/GA23-07879S" target="_blank" >GA23-07879S: Exploring how nitriding affects fatigue behaviour of additive manufactured titanium hierarchical porous structures</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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