Title :

Preparation and characterisation of the Al-Cr-Fe-Mn-Mo high-entropy alloy reinforced by in-situ formed carbides

Author(s) :

Stasiak, Tomasz [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Sow, Mourtada-Aly [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Touzin, Matthieu [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
béclin, franck [Auteur]
174496|||Unité Matériaux et Transformations - UMR 8207 [UMET]
CORDIER, Catherine [Auteur]
174496|||Unité Matériaux et Transformations - UMR 8207 [UMET]

Journal title :

Philosophical Magazine Letters

Publisher :

Informa UK Limited

Publication date :

2022-10-20

ISSN :

0950-0839

English keyword(s) :

High-entropy alloy
multicomponent material
composite
carbide
powder metallurgy

HAL domain(s) :

Chimie/Matériaux
Physique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]

English abstract : [en]

This study aimed to prepare a composite of the high-entropy alloy from the Al-Cr-Fe-Mn-Mo system reinforced by in-situ formed carbides using powder metallurgy techniques. The alloyed powder was prepared by mechanical ...
Show more >This study aimed to prepare a composite of the high-entropy alloy from the Al-Cr-Fe-Mn-Mo system reinforced by in-situ formed carbides using powder metallurgy techniques. The alloyed powder was prepared by mechanical alloying in ball-mill devices from pure elemental powders with the addition of a process control agent, namely stearic acid. Then, the alloyed powder was consolidated by hot-press sintering. The structure and microstructure of powder and bulk samples were investigated. The mechanical properties of the bulk sample were evaluated. The investigations revealed two bcc phases in the mechanically alloyed powder. The powder annealing at 950°C triggered the phase transformations, which led to the formation of the multielement matrix bcc phase (a = 2.91 Å) reinforced by two carbides molybdenum-rich M6C (a = 11.15 Å) and chromium-rich M23C6 (a = 10.66 Å). A similar composite structure was present in the bulk sample. The investigations suggested that the primary carbon source for carbide formation was the process control agent – stearic acid. The produced bulk composite revealed promising mechanical properties, such as very high hardness up to 1223 ± 99 HV2 and Young’s modulus of 246 ± 10 GPa.Show less >

Language :

Anglais

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

Université de Lille
CNRS
INRAE
ENSCL

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Research team(s) :

Métallurgie Physique et Génie des Matériaux

Submission date :

2022-10-20T14:51:22Z
2022-10-20T15:44:35Z
2022-10-21T07:03:55Z
2022-10-21T07:06:02Z
2022-10-24T14:27:53Z