A hypoeutectic high-entropy alloy with hierarchical microstructure for high-temperature application

Linxiang Liu; Zhijun Wang; Qingfeng Wu; Yuhao Jia; Q. Xu; Feng He; Junjie Li; Jincheng Wang

doi:10.1016/j.scriptamat.2023.115502

A hypoeutectic high-entropy alloy with hierarchical microstructure for high-temperature application

Linxiang Liu, Zhijun Wang, Qingfeng Wu, Yuhao Jia, Q. Xu, Feng He, Junjie Li, Jincheng Wang

School of Materials Sience and Engineering

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

18 Scopus citations

Abstract

Dual-phase high entropy alloys have great potential for high-temperature applications. In this work, a hypoeutectic Ni_41.8Co₁₉Cr₁₀Fe₁₀Al₁₅Ti₂Mo₂Hf_0.1B_0.1 high-entropy superalloy consisting of FCC and B2 matrix was developed with superior high-temperature mechanical properties. After aging, high-density L1₂ particles precipitated in the FCC matrix, while lath-shaped FCC and Cr-rich σ phases precipitated in the B2 matrix. The hierarchical microstructure contributed to the high yield strength of ∼1.1 GPa MPa at 25 °C and ∼614 MPa at 800 °C. In addition, the B2 matrix with a serrated phase boundary retarded crack nucleation and propagation, leading to an excellent tensile elongation of ∼26.1% at 800 °C. These results are significant to the development of high-performance hypoeutectic alloys for application over a wide temperature range.

Original language	English
Article number	115502
Journal	Scripta Materialia
Volume	232
DOIs	https://doi.org/10.1016/j.scriptamat.2023.115502
State	Published - 15 Jul 2023

Keywords

Deformation mechanisms
High entropy superalloys
High-temperature mechanical property
Precipitation hardening

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10.1016/j.scriptamat.2023.115502

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@article{40c74435c510472690f35074d954ba08,

title = "A hypoeutectic high-entropy alloy with hierarchical microstructure for high-temperature application",

abstract = "Dual-phase high entropy alloys have great potential for high-temperature applications. In this work, a hypoeutectic Ni41.8Co19Cr10Fe10Al15Ti2Mo2Hf0.1B0.1 high-entropy superalloy consisting of FCC and B2 matrix was developed with superior high-temperature mechanical properties. After aging, high-density L12 particles precipitated in the FCC matrix, while lath-shaped FCC and Cr-rich σ phases precipitated in the B2 matrix. The hierarchical microstructure contributed to the high yield strength of ∼1.1 GPa MPa at 25 °C and ∼614 MPa at 800 °C. In addition, the B2 matrix with a serrated phase boundary retarded crack nucleation and propagation, leading to an excellent tensile elongation of ∼26.1% at 800 °C. These results are significant to the development of high-performance hypoeutectic alloys for application over a wide temperature range.",

keywords = "Deformation mechanisms, High entropy superalloys, High-temperature mechanical property, Precipitation hardening",

author = "Linxiang Liu and Zhijun Wang and Qingfeng Wu and Yuhao Jia and Q. Xu and Feng He and Junjie Li and Jincheng Wang",

note = "Publisher Copyright: {\textcopyright} 2023",

year = "2023",

month = jul,

day = "15",

doi = "10.1016/j.scriptamat.2023.115502",

language = "英语",

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T1 - A hypoeutectic high-entropy alloy with hierarchical microstructure for high-temperature application

AU - Liu, Linxiang

AU - Wang, Zhijun

AU - Wu, Qingfeng

AU - Jia, Yuhao

AU - Xu, Q.

AU - He, Feng

AU - Li, Junjie

AU - Wang, Jincheng

PY - 2023/7/15

Y1 - 2023/7/15

N2 - Dual-phase high entropy alloys have great potential for high-temperature applications. In this work, a hypoeutectic Ni41.8Co19Cr10Fe10Al15Ti2Mo2Hf0.1B0.1 high-entropy superalloy consisting of FCC and B2 matrix was developed with superior high-temperature mechanical properties. After aging, high-density L12 particles precipitated in the FCC matrix, while lath-shaped FCC and Cr-rich σ phases precipitated in the B2 matrix. The hierarchical microstructure contributed to the high yield strength of ∼1.1 GPa MPa at 25 °C and ∼614 MPa at 800 °C. In addition, the B2 matrix with a serrated phase boundary retarded crack nucleation and propagation, leading to an excellent tensile elongation of ∼26.1% at 800 °C. These results are significant to the development of high-performance hypoeutectic alloys for application over a wide temperature range.

AB - Dual-phase high entropy alloys have great potential for high-temperature applications. In this work, a hypoeutectic Ni41.8Co19Cr10Fe10Al15Ti2Mo2Hf0.1B0.1 high-entropy superalloy consisting of FCC and B2 matrix was developed with superior high-temperature mechanical properties. After aging, high-density L12 particles precipitated in the FCC matrix, while lath-shaped FCC and Cr-rich σ phases precipitated in the B2 matrix. The hierarchical microstructure contributed to the high yield strength of ∼1.1 GPa MPa at 25 °C and ∼614 MPa at 800 °C. In addition, the B2 matrix with a serrated phase boundary retarded crack nucleation and propagation, leading to an excellent tensile elongation of ∼26.1% at 800 °C. These results are significant to the development of high-performance hypoeutectic alloys for application over a wide temperature range.

KW - Deformation mechanisms

KW - High entropy superalloys

KW - High-temperature mechanical property

KW - Precipitation hardening

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U2 - 10.1016/j.scriptamat.2023.115502

DO - 10.1016/j.scriptamat.2023.115502

M3 - 文章

AN - SCOPUS:85152598080

SN - 1359-6462

VL - 232

JO - Scripta Materialia

JF - Scripta Materialia

M1 - 115502

ER -

A hypoeutectic high-entropy alloy with hierarchical microstructure for high-temperature application

Abstract

Keywords

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