800oC-stable D022 superlattice in a NiCrFe-based medium entropy alloy

Mei Lin; Jianlin Lu; Yiming Chen; Zhongsheng Yang; Xin Liu; Kaiwei Zhang; Zhijun Wang; Junjie Li; Jincheng Wang; Feng He

doi:10.1080/21663831.2024.2309271

800^oC-stable D0₂₂ superlattice in a NiCrFe-based medium entropy alloy

Mei Lin, Jianlin Lu, Yiming Chen, Zhongsheng Yang, Xin Liu, Kaiwei Zhang, Zhijun Wang, Junjie Li, Jincheng Wang, Feng He

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

10 Scopus citations

Abstract

The metastable-stable transition and rapid coarsening of metastable D0₂₂ phase remains its Achilles hell, restricting the application of D0₂₂-strengthened alloys at service temperatures higher than 650°C. Hence, it is crucial to improve thermal stability of D0₂₂ phase. In this work, we report an 800°C-stable D0₂₂-Ni₃(W_0.24Ti_0.38Ta_0.19Nb_0.19) superlattice in the Ni₅₈Cr₂₃Fe₁₀W₅Ti₂Ta₁Nb₁ MEA. Experimental results and theoretical analysis showed that the exceptional thermal stability is due to Nb-sublattice occupying elements, low diffusivity of W, and extremely small lattice misfit between the D0₂₂ phase and FCC matrix. These findings shed lights on developing high-performance D0₂₂-hardened alloys capable of operating at temperatures above 650°C.

Original language	English
Pages (from-to)	172-179
Number of pages	8
Journal	Materials Research Letters
Volume	12
Issue number	3
DOIs	https://doi.org/10.1080/21663831.2024.2309271
State	Published - 2024

Keywords

coarsening
D0 superlattice
phase stability
precipitation hardening

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10.1080/21663831.2024.2309271

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title = "800oC-stable D022 superlattice in a NiCrFe-based medium entropy alloy",

abstract = "The metastable-stable transition and rapid coarsening of metastable D022 phase remains its Achilles hell, restricting the application of D022-strengthened alloys at service temperatures higher than 650°C. Hence, it is crucial to improve thermal stability of D022 phase. In this work, we report an 800°C-stable D022-Ni3(W0.24Ti0.38Ta0.19Nb0.19) superlattice in the Ni58Cr23Fe10W5Ti2Ta1Nb1 MEA. Experimental results and theoretical analysis showed that the exceptional thermal stability is due to Nb-sublattice occupying elements, low diffusivity of W, and extremely small lattice misfit between the D022 phase and FCC matrix. These findings shed lights on developing high-performance D022-hardened alloys capable of operating at temperatures above 650°C.",

keywords = "coarsening, D0 superlattice, phase stability, precipitation hardening",

author = "Mei Lin and Jianlin Lu and Yiming Chen and Zhongsheng Yang and Xin Liu and Kaiwei Zhang and Zhijun Wang and Junjie Li and Jincheng Wang and Feng He",

note = "Publisher Copyright: {\textcopyright} 2024 The Author(s). Published by Informa UK Limited, trading as Taylor \& Francis Group.",

year = "2024",

doi = "10.1080/21663831.2024.2309271",

language = "英语",

volume = "12",

pages = "172--179",

journal = "Materials Research Letters",

issn = "2166-3831",

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TY - JOUR

T1 - 800oC-stable D022 superlattice in a NiCrFe-based medium entropy alloy

AU - Lin, Mei

AU - Lu, Jianlin

AU - Chen, Yiming

AU - Yang, Zhongsheng

AU - Liu, Xin

AU - Zhang, Kaiwei

AU - Wang, Zhijun

AU - Li, Junjie

AU - Wang, Jincheng

AU - He, Feng

PY - 2024

Y1 - 2024

N2 - The metastable-stable transition and rapid coarsening of metastable D022 phase remains its Achilles hell, restricting the application of D022-strengthened alloys at service temperatures higher than 650°C. Hence, it is crucial to improve thermal stability of D022 phase. In this work, we report an 800°C-stable D022-Ni3(W0.24Ti0.38Ta0.19Nb0.19) superlattice in the Ni58Cr23Fe10W5Ti2Ta1Nb1 MEA. Experimental results and theoretical analysis showed that the exceptional thermal stability is due to Nb-sublattice occupying elements, low diffusivity of W, and extremely small lattice misfit between the D022 phase and FCC matrix. These findings shed lights on developing high-performance D022-hardened alloys capable of operating at temperatures above 650°C.

AB - The metastable-stable transition and rapid coarsening of metastable D022 phase remains its Achilles hell, restricting the application of D022-strengthened alloys at service temperatures higher than 650°C. Hence, it is crucial to improve thermal stability of D022 phase. In this work, we report an 800°C-stable D022-Ni3(W0.24Ti0.38Ta0.19Nb0.19) superlattice in the Ni58Cr23Fe10W5Ti2Ta1Nb1 MEA. Experimental results and theoretical analysis showed that the exceptional thermal stability is due to Nb-sublattice occupying elements, low diffusivity of W, and extremely small lattice misfit between the D022 phase and FCC matrix. These findings shed lights on developing high-performance D022-hardened alloys capable of operating at temperatures above 650°C.

KW - coarsening

KW - D0 superlattice

KW - phase stability

KW - precipitation hardening

UR - http://www.scopus.com/inward/record.url?scp=85183936239&partnerID=8YFLogxK

U2 - 10.1080/21663831.2024.2309271

DO - 10.1080/21663831.2024.2309271

M3 - 文章

AN - SCOPUS:85183936239

SN - 2166-3831

VL - 12

SP - 172

EP - 179

JO - Materials Research Letters

JF - Materials Research Letters

IS - 3

ER -

800^oC-stable D0₂₂ superlattice in a NiCrFe-based medium entropy alloy

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Keywords

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