MICROSTRUCTURE AND PROPERTIES OF NITINOL ALLOY REINFORCED WITH Ni-Ti INTERMETALLICS AND CARBIDES

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26316919%3A_____%2F25%3AN0000013" target="_blank" >RIV/26316919:_____/25:N0000013 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.icct.cz/cs/2025" target="_blank" >https://www.icct.cz/cs/2025</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

MICROSTRUCTURE AND PROPERTIES OF NITINOL ALLOY REINFORCED WITH Ni-Ti INTERMETALLICS AND CARBIDES

Popis výsledku v původním jazyce

Nitinol is well known for its unique properties, such as the shape memory effect and superelasticity. It is widely used in stents, bone fixations, joining elements, temperature sensors, actuators, and vibration dampers. The aim of this study is to investigate the effect of reinforcing intermetallic particles and carbides on the hardness, wear resistance, and microstructure of Nitinol. The samples were fabricated using direct energy deposition (DED) from powder feedstock. A pre-alloyed NiTi powder with the addition of nickel, a Ni79Ti21 (wt.%) powder mixture, and tungsten carbides (WC) was used as the feedstock material. The Ni3Ti intermetallic phase were formed in situ during the 3D printing process, while carbide particles were added separately. No defects such as cracks or pores were observed in microstructures of the carbides-reinforcement samples and the same time, the wear resistance of these samples increased significantly. On the contrary, cracks were found in samples rich in the Ni3Ti phase. The hardness of samples containing the Ni3Ti phase increased, while the hardness of the NiTi matrix in WCreinforced samples remained unchanged.

Název v anglickém jazyce

MICROSTRUCTURE AND PROPERTIES OF NITINOL ALLOY REINFORCED WITH Ni-Ti INTERMETALLICS AND CARBIDES

Popis výsledku anglicky

Nitinol is well known for its unique properties, such as the shape memory effect and superelasticity. It is widely used in stents, bone fixations, joining elements, temperature sensors, actuators, and vibration dampers. The aim of this study is to investigate the effect of reinforcing intermetallic particles and carbides on the hardness, wear resistance, and microstructure of Nitinol. The samples were fabricated using direct energy deposition (DED) from powder feedstock. A pre-alloyed NiTi powder with the addition of nickel, a Ni79Ti21 (wt.%) powder mixture, and tungsten carbides (WC) was used as the feedstock material. The Ni3Ti intermetallic phase were formed in situ during the 3D printing process, while carbide particles were added separately. No defects such as cracks or pores were observed in microstructures of the carbides-reinforcement samples and the same time, the wear resistance of these samples increased significantly. On the contrary, cracks were found in samples rich in the Ni3Ti phase. The hardness of samples containing the Ni3Ti phase increased, while the hardness of the NiTi matrix in WCreinforced samples remained unchanged.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/GA25-15757S" target="_blank" >GA25-15757S: Plazmové zhodnocení odpadu na pokročilé cermetové kompozity pro vysokou disipaci kinetické energie</a><br>

Návaznosti

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

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název statě ve sborníku

PROCEEDINGS OF THE 12TH INTERNATIONAL CONFERENCE ON CHEMICAL TECHNOLOGY, ICCT

ISBN

978-80-88307-27-3

ISSN

2336-811X

e-ISSN

2336-8128

Počet stran výsledku

4

Strana od-do

132-135

Název nakladatele

Česká Společnost Průmyslové Chemie

Místo vydání

Praha

Místo konání akce

Mikulov

Datum konání akce

14. 4. 2025

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

001678792400022