The role of the preparation route on microstructure and mechanical properties of AlCoCrFeNi high entropy alloy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F24%3A43928900" target="_blank" >RIV/60461373:22310/24:43928900 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/24:00585792 RIV/68407700:21340/24:00376539 RIV/00216208:11320/24:10493777

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S2238785424008640?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2238785424008640?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jmrt.2024.04.090" target="_blank" >10.1016/j.jmrt.2024.04.090</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The role of the preparation route on microstructure and mechanical properties of AlCoCrFeNi high entropy alloy

Popis výsledku v původním jazyce

Nearly equiatomic AlCoCrFeNi alloy samples were prepared by induction melting and mechanical alloying (MA) combined with spark plasma sintering (SPS). Thecast sample showed a dendritic microstructure composed of spinodally decomposed nanometric constituents of the B2 and BCC phases. The spark plasma sinteredsample exhibited an ultrafine-grained microstructure of B2 phase and FCC solid solution and Cr23C6 carbides. The MA + SPS sample was strengthened by compressivestress-strain test up to a yield strength of 2029 ± 5 MPa, resulting significantly higher compared to 1366 ± 32 MPa of the cast sample. In addition to the highercompressive yield strength, the sintered sample exhibited a hardness of more than 130 HV higher compared to the cast alloy. On the other hand, the cast alloy showedhigh plastic deformation (29%) and significantly high ultimate compressive strength of 3072 ± 122 MPa. Together with these mechanical characteristics, the MA +SPS sample showed good thermal stability while preserving the mechanical properties even after annealing at 800 ◦C. This was not the case with the cast sample, inwhich ductility and ultimate strength significantly decreased upon annealing at 800 ◦C. A substantial yield strength reduction of both MA + SPS and cast samples wasrecorded when tested at 800 ◦C. Nevertheless, stress-strain curve trends were observed to be quite different between the two samples, thus suggesting dissimilardeformation mechanisms under high-temperature compression.

Název v anglickém jazyce

The role of the preparation route on microstructure and mechanical properties of AlCoCrFeNi high entropy alloy

Popis výsledku anglicky

Nearly equiatomic AlCoCrFeNi alloy samples were prepared by induction melting and mechanical alloying (MA) combined with spark plasma sintering (SPS). Thecast sample showed a dendritic microstructure composed of spinodally decomposed nanometric constituents of the B2 and BCC phases. The spark plasma sinteredsample exhibited an ultrafine-grained microstructure of B2 phase and FCC solid solution and Cr23C6 carbides. The MA + SPS sample was strengthened by compressivestress-strain test up to a yield strength of 2029 ± 5 MPa, resulting significantly higher compared to 1366 ± 32 MPa of the cast sample. In addition to the highercompressive yield strength, the sintered sample exhibited a hardness of more than 130 HV higher compared to the cast alloy. On the other hand, the cast alloy showedhigh plastic deformation (29%) and significantly high ultimate compressive strength of 3072 ± 122 MPa. Together with these mechanical characteristics, the MA +SPS sample showed good thermal stability while preserving the mechanical properties even after annealing at 800 ◦C. This was not the case with the cast sample, inwhich ductility and ultimate strength significantly decreased upon annealing at 800 ◦C. A substantial yield strength reduction of both MA + SPS and cast samples wasrecorded when tested at 800 ◦C. Nevertheless, stress-strain curve trends were observed to be quite different between the two samples, thus suggesting dissimilardeformation mechanisms under high-temperature compression.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Journal of Materials Research and Technology-JMR&amp;T

ISSN

2238-7854

e-ISSN

2214-0697

Svazek periodika

30

Číslo periodika v rámci svazku

May-June 2024

Stát vydavatele periodika

BR - Brazilská federativní republika

Počet stran výsledku

13

Strana od-do

4248-4260

Kód UT WoS článku

001290959700001

EID výsledku v databázi Scopus

2-s2.0-85190889609