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

Result code in 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>

Alternative codes found

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

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20501 - Materials engineering

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

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

Publication year

2024

Confidentiality

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

Name of the periodical

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

ISSN

2238-7854

e-ISSN

2214-0697

Volume of the periodical

30

Issue of the periodical within the volume

May-June 2024

Country of publishing house

BR - BRAZIL

Number of pages

13

Pages from-to

4248-4260

UT code for WoS article

001290959700001

EID of the result in the Scopus database

2-s2.0-85190889609