Cr-Mo-V-W: a new refractory and transition metal high-entropy alloy system
File(s)
Author(s)
Type
Journal Article
Abstract
Cr-Mo-V-W high-entropy alloy (HEA) is studied, with 2553 K equilibrium solidus and high Cr content to promote protective oxide scale formation, suggesting potential applications in hot, oxidising environments. Alloy Search and Predict (ASAP) and phase diagram calculations found a single phase, body-centred cubic (BCC) solid solution at elevated temperatures, across the range of compositions present within the system - uncommon for a HEA of refractory and transition metals. Density functional theory identified solubility of 22 at.% Cr at solidus temperature, with composition-dependent drive for segregation during cooling. An as-cast, BCC single-phase with the composition 31.3Cr-23.6Mo-26.4 V-18.7 W exhibiting dendritic microsegregation was verified.
Date Issued
2019-01-01
Date Acceptance
2018-08-25
Citation
Scripta Materialia, 2019, 158, pp.141-145
ISSN
1359-6462
Publisher
Elsevier
Start Page
141
End Page
145
Journal / Book Title
Scripta Materialia
Volume
158
Copyright Statement
© 2018 Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence http://creativecommons.org/licenses/by-nc-nd/4.0/
Sponsor
United Kingdom Atomic Energy Authority
Grant Number
2011153
Subjects
Science & Technology
Technology
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Metallurgy & Metallurgical Engineering
Science & Technology - Other Topics
Materials Science
Alloy Search and Predict (ASAP)
Refractory metals
CALPHAD
Density functional theory (DFT)
Microstructure
MULTICOMPONENT ALLOYS
SOLID-SOLUTION
NBCRMO0.5TA0.5TIZR ALLOY
ANNEALING TREATMENT
WEAR BEHAVIOR
MICROSTRUCTURE
PHASE
OXIDATION
DESIGN
STABILITY
0912 Materials Engineering
0913 Mechanical Engineering
Materials
Publication Status
Published
Date Publish Online
2018-09-06