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Tungsten-based bcc-superalloys

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Title: Tungsten-based bcc-superalloys
Authors: Knowles, A
Dye, D
Dodds, R
Watson, A
Hardie, C
Humphry-Baker, S
Item Type: Journal Article
Abstract: Applications from nuclear energy to rockets and jet engines are underpinned by advanced high temperature materials. Whilst state of the art, the performance of current nickel-based superalloys is fundamentally limited to Ni’s melting point, T. Here, we develop an analogous superalloy concept but with superior high temperature capability by transitioning to a bcc tungsten base, T. This strategy involves reinforcing bcc -W by TiFe intermetallic compound, which results in impressive high temperature compressive strengths of 500 MPa at . This bcc-superalloy design approach has wider applicability to other bcc alloy bases, including Mo, Ta, and Nb, as well as to refractory-metal high entropy alloys (RHEAs). By investigation of the underlying phase equilibria, thermodynamic modelling, characterisation and mechanical properties, we demonstrate the capability of ternary W-Ti-Fe tungsten-based bcc-superalloys as a new class of high temperature materials.
Issue Date: 1-Jun-2021
Date of Acceptance: 17-Mar-2021
URI: http://hdl.handle.net/10044/1/88771
DOI: 10.1016/j.apmt.2021.101014
ISSN: 2352-9407
Publisher: Elsevier
Start Page: 1
End Page: 6
Journal / Book Title: Applied Materials Today
Volume: 23
Issue: 1
Copyright Statement: © 2021 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/Funder: Engineering & Physical Science Research Council (E
Engineering & Physical Science Research Council (E
The Royal Society
United Kingdom Atomic Energy Authority
Funder's Grant Number: 138874
Keywords: 0204 Condensed Matter Physics
0912 Materials Engineering
1007 Nanotechnology
Publication Status: Published
Article Number: 101014
Online Publication Date: 2021-03-30
Appears in Collections:Materials
Faculty of Natural Sciences

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