Influence of the Al Content on the Properties of Mechanically Alloyed CoCrFeNiMnXAl20????X High-Entropy Alloys

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F22%3A43924875" target="_blank" >RIV/60461373:22310/22:43924875 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.mdpi.com/1996-1944/15/22/7899" target="_blank" >https://www.mdpi.com/1996-1944/15/22/7899</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/ma15227899" target="_blank" >10.3390/ma15227899</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Influence of the Al Content on the Properties of Mechanically Alloyed CoCrFeNiMnXAl20????X High-Entropy Alloys

Popis výsledku v původním jazyce

The equiatomic CoCrFeNiMn alloy prepared by mechanical alloying and spark plasmasintering underwent partial substitution of Mn by Al (5, 10 and 15 at.%) to determine its influenceon mechanical properties and thermal stability. It was discovered that the higher the Al content,the higher the volume fraction of the hard phase with primitive cubic (PC) crystallographic lattice,which increases the hardness and strength of the alloys. The most promising mechanical propertieshave been achieved in the CoCrFeNiMn5Al15 alloy reaching the compressive yield strength (CYS)of 2135 21 MPa and the ultimate compressive strength (UCS) of 2496 21 MPa. All the preparedalloys showed good thermal stability as they maintained or only slightly reduced their initial hardnessduring the 100 h annealing at 800 C. Furthermore, the higher the Al content, the higher the resistanceagainst high-temperature oxidation. The oxidic layer changed its composition from Mn-oxides(CoCrFeNiMn15Al15 alloy) to Al-based oxides with exceptional protective properties.

Název v anglickém jazyce

Influence of the Al Content on the Properties of Mechanically Alloyed CoCrFeNiMnXAl20????X High-Entropy Alloys

Popis výsledku anglicky

The equiatomic CoCrFeNiMn alloy prepared by mechanical alloying and spark plasmasintering underwent partial substitution of Mn by Al (5, 10 and 15 at.%) to determine its influenceon mechanical properties and thermal stability. It was discovered that the higher the Al content,the higher the volume fraction of the hard phase with primitive cubic (PC) crystallographic lattice,which increases the hardness and strength of the alloys. The most promising mechanical propertieshave been achieved in the CoCrFeNiMn5Al15 alloy reaching the compressive yield strength (CYS)of 2135 21 MPa and the ultimate compressive strength (UCS) of 2496 21 MPa. All the preparedalloys showed good thermal stability as they maintained or only slightly reduced their initial hardnessduring the 100 h annealing at 800 C. Furthermore, the higher the Al content, the higher the resistanceagainst high-temperature oxidation. The oxidic layer changed its composition from Mn-oxides(CoCrFeNiMn15Al15 alloy) to Al-based oxides with exceptional protective properties.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/GA21-11313S" target="_blank" >GA21-11313S: Příprava nanokrystalických kompozitních slitin s vysokou entropií a kontrolovatelnými vlastnostmi</a><br>

Návaznosti

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

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Materials

ISSN

1996-1944

e-ISSN

—

Svazek periodika

15

Číslo periodika v rámci svazku

22

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

17

Strana od-do

nestrankovano

Kód UT WoS článku

000887441300001

EID výsledku v databázi Scopus

2-s2.0-85142720571