Title :

Atomic scale modeling of structural phase transformations in AlCrFeMnMo high-entropy alloys during thermal treatments

Author(s) :

Sekkal, Wassila [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Besson, Rémy [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Legris, Alexandre [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]

Journal title :

Journal of Alloys and Compounds

Volume number :

876

Pages :

160201

Publisher :

Elsevier

Publication date :

2021-09-25

ISSN :

0925-8388

HAL domain(s) :

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

English abstract : [en]

The objective of this work is to provide an overview of the evolution of phase transformations in AlCrFeMnMo high-entropy alloys (HEAs), a recently proposed family showing great promises in metallurgical industry for coating ...
Show more >The objective of this work is to provide an overview of the evolution of phase transformations in AlCrFeMnMo high-entropy alloys (HEAs), a recently proposed family showing great promises in metallurgical industry for coating applications. We perform Monte-Carlo simulations based on ab initio energy parameters, to analyze the order/disorder transition and the phase separation process from the high-temperature A2 single phase. The reliability of the atomic-scale approach, already known to work on AlCoCrFeNi, is first confirmed on AlCrFeMnNi, the presence of A2-(Cr,Fe,Mn) and B2-(Al,Ni) being in good agreement with previous experimental studies. However, simulations of equimolar AlCrFeMnMo show that the A2 solid solution should transform into two B2 phases at ambient temperature, instead of a couple of A2 phases observed experimentally. The reasons for this discrepancy are discussed. Increasing iron and decreasing molybdenum contents in AlCrFeMnMo favors ordering for chromium and phase change for aluminum, without changing the conclusion on A2 / B2 competition previously drawn from the equimolar case.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

Université de Lille
CNRS
INRA
ENSCL

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Research team(s) :

Métallurgie Physique et Génie des Matériaux

Submission date :

2021-05-27T05:37:56Z
2021-05-28T18:45:35Z
2021-06-10T09:26:34Z
2021-10-07T12:26:02Z