Synergistic effects of Al and Ti on the oxidation behaviour and mechanical properties of L12-strengthened FeCoCrNi high-entropy alloys

Z. Y. Ding; B. X. Cao; J. H. Luan; Z. B. Jiao

doi:10.1016/j.corsci.2021.109365

Synergistic effects of Al and Ti on the oxidation behaviour and mechanical properties of L1₂-strengthened FeCoCrNi high-entropy alloys

Z. Y. Ding, B. X. Cao, J. H. Luan, Z. B. Jiao

Research output: Journal article publication › Journal article › Academic research › peer-review

29 Citations (Scopus)

Abstract

Synergistic effects of Al and Ti on the oxidation behaviour and mechanical properties of FeCoCrNi high-entropy alloys were systematically investigated. Our results reveal that increasing the Al/Ti ratio slows down the oxidation kinetics at 700−900 °C and changes the oxide scale from TiO₂ and spinel oxides to Cr₂O₃ and Al₂O₃, leading to a substantial improvement of oxidation resistance. From a mechanical aspect, however, increasing the Al/Ti ratio decreases the mechanical strength, demonstrating a strong trade-off between oxidation resistance and mechanical properties. The underlying mechanisms for the Al and Ti effects on the oxidation resistance and mechanical properties were discussed.

Original language	English
Article number	109365
Journal	Corrosion Science
Volume	184
DOIs	https://doi.org/10.1016/j.corsci.2021.109365
Publication status	Published - 15 May 2021

Keywords

A. High-entropy alloy
C. Mechanical property
C. Oxidation
C. Oxide scale microstructure
C. Precipitate

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)
Materials Science(all)

More information

10.1016/j.corsci.2021.109365

http://hdl.handle.net/10397/90342

Cite this

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title = "Synergistic effects of Al and Ti on the oxidation behaviour and mechanical properties of L12-strengthened FeCoCrNi high-entropy alloys",

abstract = "Synergistic effects of Al and Ti on the oxidation behaviour and mechanical properties of FeCoCrNi high-entropy alloys were systematically investigated. Our results reveal that increasing the Al/Ti ratio slows down the oxidation kinetics at 700−900 °C and changes the oxide scale from TiO2 and spinel oxides to Cr2O3 and Al2O3, leading to a substantial improvement of oxidation resistance. From a mechanical aspect, however, increasing the Al/Ti ratio decreases the mechanical strength, demonstrating a strong trade-off between oxidation resistance and mechanical properties. The underlying mechanisms for the Al and Ti effects on the oxidation resistance and mechanical properties were discussed.",

keywords = "A. High-entropy alloy, C. Mechanical property, C. Oxidation, C. Oxide scale microstructure, C. Precipitate",

author = "Ding, {Z. Y.} and Cao, {B. X.} and Luan, {J. H.} and Jiao, {Z. B.}",

note = "Funding Information: This research was supported by the Early Career Scheme from the Research Grants Council of Hong Kong (25202719), and Guangzhou International Science & Technology Cooperation Program (201907010026), and PolyU internal funds (P0009738, P0000538, and P0013994). Publisher Copyright: {\textcopyright} 2021 Elsevier Ltd Copyright: Copyright 2021 Elsevier B.V., All rights reserved.",

year = "2021",

month = may,

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doi = "10.1016/j.corsci.2021.109365",

language = "English",

volume = "184",

journal = "Corrosion Science",

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TY - JOUR

T1 - Synergistic effects of Al and Ti on the oxidation behaviour and mechanical properties of L12-strengthened FeCoCrNi high-entropy alloys

AU - Ding, Z. Y.

AU - Cao, B. X.

AU - Luan, J. H.

AU - Jiao, Z. B.

N1 - Funding Information: This research was supported by the Early Career Scheme from the Research Grants Council of Hong Kong (25202719), and Guangzhou International Science & Technology Cooperation Program (201907010026), and PolyU internal funds (P0009738, P0000538, and P0013994). Publisher Copyright: © 2021 Elsevier Ltd Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2021/5/15

Y1 - 2021/5/15

N2 - Synergistic effects of Al and Ti on the oxidation behaviour and mechanical properties of FeCoCrNi high-entropy alloys were systematically investigated. Our results reveal that increasing the Al/Ti ratio slows down the oxidation kinetics at 700−900 °C and changes the oxide scale from TiO2 and spinel oxides to Cr2O3 and Al2O3, leading to a substantial improvement of oxidation resistance. From a mechanical aspect, however, increasing the Al/Ti ratio decreases the mechanical strength, demonstrating a strong trade-off between oxidation resistance and mechanical properties. The underlying mechanisms for the Al and Ti effects on the oxidation resistance and mechanical properties were discussed.

AB - Synergistic effects of Al and Ti on the oxidation behaviour and mechanical properties of FeCoCrNi high-entropy alloys were systematically investigated. Our results reveal that increasing the Al/Ti ratio slows down the oxidation kinetics at 700−900 °C and changes the oxide scale from TiO2 and spinel oxides to Cr2O3 and Al2O3, leading to a substantial improvement of oxidation resistance. From a mechanical aspect, however, increasing the Al/Ti ratio decreases the mechanical strength, demonstrating a strong trade-off between oxidation resistance and mechanical properties. The underlying mechanisms for the Al and Ti effects on the oxidation resistance and mechanical properties were discussed.

KW - A. High-entropy alloy

KW - C. Mechanical property

KW - C. Oxidation

KW - C. Oxide scale microstructure

KW - C. Precipitate

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U2 - 10.1016/j.corsci.2021.109365

DO - 10.1016/j.corsci.2021.109365

M3 - Journal article

AN - SCOPUS:85102001424

SN - 0010-938X

VL - 184

JO - Corrosion Science

JF - Corrosion Science

M1 - 109365

ER -