Designing thermally stable L12-strengthened Ni-Co-based high-entropy alloys with simultaneously enhanced oxidation and creep resistance

G. L. Li; J. X. Hou; J. Gan; W. J. Huang; L. J. Jing; J. Ju; Y. L. Zhao; Z. K. Ren; M. Zhang; J. W. Qiao; T. Yang

doi:10.1016/j.corsci.2025.113482

Designing thermally stable L1₂-strengthened Ni-Co-based high-entropy alloys with simultaneously enhanced oxidation and creep resistance

G. L. Li
, J. X. Hou^*
, J. Gan
, W. J. Huang
, L. J. Jing
, J. Ju
, Y. L. Zhao
, Z. K. Ren
, M. Zhang
, J. W. Qiao
, T. Yang

^*Corresponding author for this work

Taiyuan University of Technology
City University of Hong Kong
Harbin Institute of Technology (Shenzhen)

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

2 Scopus citations

Abstract

High-temperature oxidation and creep properties of L1₂-strengthened Ni-Co-Fe-Cr-Al-Nb-Ti-Ta-B alloy system with various Ti/Ta ratios were investigated at 800 °C. The addition of Ta promotes the formation of dense Al₂O₃/Cr₂O₃ oxide scale, lowers the oxidation rate (from 1.70 × 10⁻⁴ to 1.57 × 10⁻⁴ mg² cm⁻⁴ h⁻¹), and inhibits internal oxidation and nitridation. The creep life at 800 °C/220 MPa is extended from 322 to 1300 h with the substitution of Ti by Ta, exhibiting a lowest steady-state creep rate of 9.51 × 10⁻⁸ s⁻¹ compared to the Ti-bearing alloys, resulting from the enhanced oxidation resistance and precipitates shearing mechanisms.

Original language	English
Article number	113482
Journal	Corrosion Science
Volume	259
DOIs	https://doi.org/10.1016/j.corsci.2025.113482
State	Published - Feb 2026
Externally published	Yes

Keywords

Coherent precipitation strengthening
Creep resistance
High-entropy alloys
Oxidation resistance

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10.1016/j.corsci.2025.113482

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@article{f5bb04de7f974affb20e3159e535a6d3,

title = "Designing thermally stable L12-strengthened Ni-Co-based high-entropy alloys with simultaneously enhanced oxidation and creep resistance",

abstract = "High-temperature oxidation and creep properties of L12-strengthened Ni-Co-Fe-Cr-Al-Nb-Ti-Ta-B alloy system with various Ti/Ta ratios were investigated at 800 °C. The addition of Ta promotes the formation of dense Al2O3/Cr2O3 oxide scale, lowers the oxidation rate (from 1.70 × 10−4 to 1.57 × 10−4 mg2 cm−4 h−1), and inhibits internal oxidation and nitridation. The creep life at 800 °C/220 MPa is extended from 322 to 1300 h with the substitution of Ti by Ta, exhibiting a lowest steady-state creep rate of 9.51 × 10−8 s−1 compared to the Ti-bearing alloys, resulting from the enhanced oxidation resistance and precipitates shearing mechanisms.",

keywords = "Coherent precipitation strengthening, Creep resistance, High-entropy alloys, Oxidation resistance",

author = "Li, \{G. L.\} and Hou, \{J. X.\} and J. Gan and Huang, \{W. J.\} and Jing, \{L. J.\} and J. Ju and Zhao, \{Y. L.\} and Ren, \{Z. K.\} and M. Zhang and Qiao, \{J. W.\} and T. Yang",

note = "Publisher Copyright: {\textcopyright} 2025 Elsevier Ltd",

year = "2026",

month = feb,

doi = "10.1016/j.corsci.2025.113482",

language = "英语",

volume = "259",

journal = "Corrosion Science",

issn = "0010-938X",

publisher = "Elsevier Ltd",

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TY - JOUR

T1 - Designing thermally stable L12-strengthened Ni-Co-based high-entropy alloys with simultaneously enhanced oxidation and creep resistance

AU - Li, G. L.

AU - Hou, J. X.

AU - Gan, J.

AU - Huang, W. J.

AU - Jing, L. J.

AU - Ju, J.

AU - Zhao, Y. L.

AU - Ren, Z. K.

AU - Zhang, M.

AU - Qiao, J. W.

AU - Yang, T.

PY - 2026/2

Y1 - 2026/2

N2 - High-temperature oxidation and creep properties of L12-strengthened Ni-Co-Fe-Cr-Al-Nb-Ti-Ta-B alloy system with various Ti/Ta ratios were investigated at 800 °C. The addition of Ta promotes the formation of dense Al2O3/Cr2O3 oxide scale, lowers the oxidation rate (from 1.70 × 10−4 to 1.57 × 10−4 mg2 cm−4 h−1), and inhibits internal oxidation and nitridation. The creep life at 800 °C/220 MPa is extended from 322 to 1300 h with the substitution of Ti by Ta, exhibiting a lowest steady-state creep rate of 9.51 × 10−8 s−1 compared to the Ti-bearing alloys, resulting from the enhanced oxidation resistance and precipitates shearing mechanisms.

AB - High-temperature oxidation and creep properties of L12-strengthened Ni-Co-Fe-Cr-Al-Nb-Ti-Ta-B alloy system with various Ti/Ta ratios were investigated at 800 °C. The addition of Ta promotes the formation of dense Al2O3/Cr2O3 oxide scale, lowers the oxidation rate (from 1.70 × 10−4 to 1.57 × 10−4 mg2 cm−4 h−1), and inhibits internal oxidation and nitridation. The creep life at 800 °C/220 MPa is extended from 322 to 1300 h with the substitution of Ti by Ta, exhibiting a lowest steady-state creep rate of 9.51 × 10−8 s−1 compared to the Ti-bearing alloys, resulting from the enhanced oxidation resistance and precipitates shearing mechanisms.

KW - Coherent precipitation strengthening

KW - Creep resistance

KW - High-entropy alloys

KW - Oxidation resistance

UR - https://www.scopus.com/pages/publications/105021237469

U2 - 10.1016/j.corsci.2025.113482

DO - 10.1016/j.corsci.2025.113482

M3 - 文章

AN - SCOPUS:105021237469

SN - 0010-938X

VL - 259

JO - Corrosion Science

JF - Corrosion Science

M1 - 113482

ER -

Designing thermally stable L1₂-strengthened Ni-Co-based high-entropy alloys with simultaneously enhanced oxidation and creep resistance

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Keywords

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