Effect of initial grain size on oxidation resistance of L12-strengthened Al-Fe-Cr-Cu-Ni high-entropy alloy at 900 ℃

G.Q. Huang; T.H. Chou; S.F. Liu; J. Ju; J. Gan; T. Yang; X.M. Feng; Y.F. Shen; J.C. Gao; M.S. Li; F.Q. Meng

doi:10.1016/j.apsusc.2023.159285

Effect of initial grain size on oxidation resistance of L1₂-strengthened Al-Fe-Cr-Cu-Ni high-entropy alloy at 900 ℃

G.Q. Huang, T.H. Chou, S.F. Liu, J. Ju^*, J. Gan, T. Yang^*, X.M. Feng, Y.F. Shen, J.C. Gao, M.S. Li, F.Q. Meng^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

11 Citations (Scopus)

Abstract

The oxidation behavior of L1₂-strengthened Al_0.3FeCrCuNi₂ high-entropy alloy (HEA) with various initial grain sizes was investigated by isothermal oxidation at 900 °C in air. The results show that the starting grain size has a significant effect on the oxidation kinetic process. Reducing the grain size promotes the direct formation of more protective Al-rich oxide layer in the regions near the grain boundaries (GBs), and allows the development of a denser inner Al₂O₃ layer in the intragranular regions, thereby improving the oxidation resistance. This effect is mainly attributed to more significant surface Cu segregation near GBs due to grain refinement. © 2024 Elsevier B.V.

Original language	English
Article number	159285
Journal	Applied Surface Science
Volume	652
Online published	5 Jan 2024
DOIs	https://doi.org/10.1016/j.apsusc.2023.159285
Publication status	Published - 15 Apr 2024

Funding

This work was supported by the National Key R&D Program of China (No. 2022YFA1603801 ) and the National Nature Science Foundation of China (Nos. 52205436 , 52271126 ).

Research Keywords

Grain size
High-entropy alloy
L12/FCC microstructure
Oxidation behavior

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@article{4af4987791884c1e8f00d376f915c898,

title = "Effect of initial grain size on oxidation resistance of L12-strengthened Al-Fe-Cr-Cu-Ni high-entropy alloy at 900 ℃",

abstract = "The oxidation behavior of L12-strengthened Al0.3FeCrCuNi2 high-entropy alloy (HEA) with various initial grain sizes was investigated by isothermal oxidation at 900 °C in air. The results show that the starting grain size has a significant effect on the oxidation kinetic process. Reducing the grain size promotes the direct formation of more protective Al-rich oxide layer in the regions near the grain boundaries (GBs), and allows the development of a denser inner Al2O3 layer in the intragranular regions, thereby improving the oxidation resistance. This effect is mainly attributed to more significant surface Cu segregation near GBs due to grain refinement. {\textcopyright} 2024 Elsevier B.V.",

keywords = "Grain size, High-entropy alloy, L12/FCC microstructure, Oxidation behavior",

author = "G.Q. Huang and T.H. Chou and S.F. Liu and J. Ju and J. Gan and T. Yang and X.M. Feng and Y.F. Shen and J.C. Gao and M.S. Li and F.Q. Meng",

year = "2024",

month = apr,

day = "15",

doi = "10.1016/j.apsusc.2023.159285",

language = "English",

volume = "652",

journal = "Applied Surface Science",

issn = "0169-4332",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Effect of initial grain size on oxidation resistance of L12-strengthened Al-Fe-Cr-Cu-Ni high-entropy alloy at 900 ℃

AU - Huang, G.Q.

AU - Chou, T.H.

AU - Liu, S.F.

AU - Ju, J.

AU - Gan, J.

AU - Yang, T.

AU - Feng, X.M.

AU - Shen, Y.F.

AU - Gao, J.C.

AU - Li, M.S.

AU - Meng, F.Q.

PY - 2024/4/15

Y1 - 2024/4/15

N2 - The oxidation behavior of L12-strengthened Al0.3FeCrCuNi2 high-entropy alloy (HEA) with various initial grain sizes was investigated by isothermal oxidation at 900 °C in air. The results show that the starting grain size has a significant effect on the oxidation kinetic process. Reducing the grain size promotes the direct formation of more protective Al-rich oxide layer in the regions near the grain boundaries (GBs), and allows the development of a denser inner Al2O3 layer in the intragranular regions, thereby improving the oxidation resistance. This effect is mainly attributed to more significant surface Cu segregation near GBs due to grain refinement. © 2024 Elsevier B.V.

AB - The oxidation behavior of L12-strengthened Al0.3FeCrCuNi2 high-entropy alloy (HEA) with various initial grain sizes was investigated by isothermal oxidation at 900 °C in air. The results show that the starting grain size has a significant effect on the oxidation kinetic process. Reducing the grain size promotes the direct formation of more protective Al-rich oxide layer in the regions near the grain boundaries (GBs), and allows the development of a denser inner Al2O3 layer in the intragranular regions, thereby improving the oxidation resistance. This effect is mainly attributed to more significant surface Cu segregation near GBs due to grain refinement. © 2024 Elsevier B.V.

KW - Grain size

KW - High-entropy alloy

KW - L12/FCC microstructure

KW - Oxidation behavior

UR - http://www.scopus.com/inward/record.url?scp=85181831348&partnerID=8YFLogxK

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85181831348&origin=recordpage

U2 - 10.1016/j.apsusc.2023.159285

DO - 10.1016/j.apsusc.2023.159285

M3 - RGC 21 - Publication in refereed journal

SN - 0169-4332

VL - 652

JO - Applied Surface Science

JF - Applied Surface Science

M1 - 159285

ER -