High-strength Al0.2Co1.5CrFeNi1.5Ti high-entropy alloy produced by powder metallurgy and casting: A comparison of microstructures, mechanical and tribological properties

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F19%3APU134482" target="_blank" >RIV/00216305:26210/19:PU134482 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/20:10423780

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S1044580319325392" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1044580319325392</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.matchar.2019.110046" target="_blank" >10.1016/j.matchar.2019.110046</a>

Jazyk výsledku

angličtina

Název v původním jazyce

High-strength Al0.2Co1.5CrFeNi1.5Ti high-entropy alloy produced by powder metallurgy and casting: A comparison of microstructures, mechanical and tribological properties

Popis výsledku v původním jazyce

This work presents an in-depth comparison of the microstructural origins of high strength and high wear re-sistance in the Al0.2Co1.5CrFeNi1.5Ti high-entropy alloy produced by powder metallurgy (PM) and casting.The PM alloy microstructure is composed almost exclusively offine-grained FCC phase with minor, in-situformed TiC particles. The latter is responsible for a grain-boundary pinning effect and, consequently, the high-hardness of 712 HV was achieved allied with excellentflexural strength (2018 MPa) and elastic modulus of258 GPa. Its wear properties surpass those of the wear-resistant AISI 52100 steel under 1.2 N load. Despite thehigh strength properties of PM alloy, a ductile fracture behaviour was retained.In contrast, the cast alloy is composed of a coarse-grained dendritic microstructure of FCC matrix containing acomplex of intermetallic phases. Its tribological properties are superior to traditional AISI 52100 steel under allsliding conditions, exhibiting the best results among all tested materials. However, its elastic modulus (210 GPa)andflexural strength (1101 MPa), at a comparable hardness level (682 HV), were significantly lower whencompared to the PM counterpart. This stems from the intrinsic brittleness of the cast material, a consequence ofits complex microstructure, exhibiting pure cleavage-type fracture in several areas of the fracture surface.

Název v anglickém jazyce

High-strength Al0.2Co1.5CrFeNi1.5Ti high-entropy alloy produced by powder metallurgy and casting: A comparison of microstructures, mechanical and tribological properties

Popis výsledku anglicky

This work presents an in-depth comparison of the microstructural origins of high strength and high wear re-sistance in the Al0.2Co1.5CrFeNi1.5Ti high-entropy alloy produced by powder metallurgy (PM) and casting.The PM alloy microstructure is composed almost exclusively offine-grained FCC phase with minor, in-situformed TiC particles. The latter is responsible for a grain-boundary pinning effect and, consequently, the high-hardness of 712 HV was achieved allied with excellentflexural strength (2018 MPa) and elastic modulus of258 GPa. Its wear properties surpass those of the wear-resistant AISI 52100 steel under 1.2 N load. Despite thehigh strength properties of PM alloy, a ductile fracture behaviour was retained.In contrast, the cast alloy is composed of a coarse-grained dendritic microstructure of FCC matrix containing acomplex of intermetallic phases. Its tribological properties are superior to traditional AISI 52100 steel under allsliding conditions, exhibiting the best results among all tested materials. However, its elastic modulus (210 GPa)andflexural strength (1101 MPa), at a comparable hardness level (682 HV), were significantly lower whencompared to the PM counterpart. This stems from the intrinsic brittleness of the cast material, a consequence ofits complex microstructure, exhibiting pure cleavage-type fracture in several areas of the fracture surface.

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

2020

Kód důvěrnosti údajů

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

Název periodika

MATERIALS CHARACTERIZATION

ISSN

1044-5803

e-ISSN

1873-4189

Svazek periodika

159

Číslo periodika v rámci svazku

110046

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

16

Strana od-do

1-16

Kód UT WoS článku

000509819000006

EID výsledku v databázi Scopus

2-s2.0-85075909433