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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

On short-range order strengthening and its role in high-entropy alloys

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Author(s):
Schon, Claudio Geraldo [1]
Total Authors: 1
Affiliation:
[1] Univ Sao Paulo, Dept Met & Mat Engn, Escola Politecn, Av Prof Mello Moraes 2463, BR-05508030 Sao Paulo, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: SCRIPTA MATERIALIA; v. 196, APR 15 2021.
Web of Science Citations: 0
Abstract

Short-range order (SRO) strengthening is one of the major strengthening mechanisms in alloys. Generally it is attributed to the increased resistance to dislocation slip caused by breaking favorable bonds. This contribution may be strong for the first dislocation slipping in a slip plane, but it is certainly less strong for the following next dislocations. Present work discusses SRO strengthening with a different optic: with the focus on the dissipated energy due to the formation of a diffuse antiphase boundary (APB). In this sense, SRO strengthening becomes important to define the friction stress on gliding dislocations. Cluster Variation Method calculations of APB energies are used to estimate the strengthening effect in BCC alloys. The results are illustrated using VNbTaMoW and VNbTaWAl high-entropy alloys, with ab-initio derived parameters. The results show that the strengthening is intense in the range of concentrated solid solutions, and also, that this effect is strongly composition-dependent. (C) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 18/22114-1 - Thermodynamics of highly concentrated alloys: reequiment of the Computational Materials Science Laboratory
Grantee:Claudio Geraldo Schon
Support Opportunities: Regular Research Grants