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^*

^*Corresponding author for this work

Hong Kong Polytechnic University
City University of Hong Kong

Research output: Contribution to journal › Article › peer-review

124 Scopus citations

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
State	Published - 15 May 2021
Externally published	Yes

Keywords

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

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10.1016/j.corsci.2021.109365

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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.\}",

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year = "2021",

month = may,

day = "15",

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

language = "英语",

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.

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

UR - https://www.scopus.com/pages/publications/85102001424

U2 - 10.1016/j.corsci.2021.109365

DO - 10.1016/j.corsci.2021.109365

M3 - 文章

AN - SCOPUS:85102001424

SN - 0010-938X

VL - 184

JO - Corrosion Science

JF - Corrosion Science

M1 - 109365

ER -

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

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Keywords

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