CoCrFeNiMn High-Entropy Alloy With Graphite And Plasma-Gasified Carbon Addition

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F25%3A00390904" target="_blank" >RIV/68407700:21340/25:00390904 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.59499/EP256764300" target="_blank" >https://doi.org/10.59499/EP256764300</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.59499/EP256764300" target="_blank" >10.59499/EP256764300</a>

Jazyk výsledku

angličtina

Název v původním jazyce

CoCrFeNiMn High-Entropy Alloy With Graphite And Plasma-Gasified Carbon Addition

Popis výsledku v původním jazyce

CoCrFeNiMn alloy in equiatomic composition was prepared from pure metals by powder metallurgy, and the reinforcing carbides were formed in situ after adding 1 wt.% of two precursors - machined graphite (C) and plasma-gasified carbon (PG). The powder was either mixed with the precursors, or 30 min. of mechanical alloying (MA) in a planetary ball mill was carried out. The microstructure, phase composition, and mechanical properties of spark plasma sintered (SPS) compacts were studied. During sintering, the matrix remained as an FCC phase while Cr23C6 carbides, which formed throughout MA, transformed to Cr7C3. The best mechanical properties were achieved for the PG-reinforced alloy after 30 min of MA. This material reached a compressive yield strength (CYS) of 1237 ± 50 MPa and ultimate compressive strength (UCS) of 1998 ± 46 MPa, together with ductility of 25%. The MA+SPS reference alloy compacts without carbide reinforcement had CYS of 988 ± 14 MPa; the UCS was not measured because of the very high plasticity of the alloy (no fracture occurred).

Název v anglickém jazyce

CoCrFeNiMn High-Entropy Alloy With Graphite And Plasma-Gasified Carbon Addition

Popis výsledku anglicky

CoCrFeNiMn alloy in equiatomic composition was prepared from pure metals by powder metallurgy, and the reinforcing carbides were formed in situ after adding 1 wt.% of two precursors - machined graphite (C) and plasma-gasified carbon (PG). The powder was either mixed with the precursors, or 30 min. of mechanical alloying (MA) in a planetary ball mill was carried out. The microstructure, phase composition, and mechanical properties of spark plasma sintered (SPS) compacts were studied. During sintering, the matrix remained as an FCC phase while Cr23C6 carbides, which formed throughout MA, transformed to Cr7C3. The best mechanical properties were achieved for the PG-reinforced alloy after 30 min of MA. This material reached a compressive yield strength (CYS) of 1237 ± 50 MPa and ultimate compressive strength (UCS) of 1998 ± 46 MPa, together with ductility of 25%. The MA+SPS reference alloy compacts without carbide reinforcement had CYS of 988 ± 14 MPa; the UCS was not measured because of the very high plasticity of the alloy (no fracture occurred).

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/GA24-10767S" target="_blank" >GA24-10767S: Pokročilé slitiny s vysokou entropií vyztužené pomocí in-situ připravených karbidů z různých typů nanostrukturovaných uhlíkových prekurzorů</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

European Powder Metallurgy Association Proceedings

ISBN

9798331328221

ISSN

—

e-ISSN

—

Počet stran výsledku

6

Strana od-do

—

Název nakladatele

European Powder Metallurgy Association

Místo vydání

—

Místo konání akce

Glasgow

Datum konání akce

14. 9. 2025

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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