Effect of Re and Ru on the phase stability and coarsening kinetics of L12 phase in a Ni29Co27Fe27Cr3Al7Ti7 high entropy alloy

Kaiwei Zhang; Feng He; Zhongsheng Yang; Dingcong Cui; Junjie Li; Zenan Yang; Jincheng Wang; Zhijun Wang

doi:10.1016/j.jallcom.2021.158904

Effect of Re and Ru on the phase stability and coarsening kinetics of L1₂ phase in a Ni₂₉Co₂₇Fe₂₇Cr₃Al₇Ti₇ high entropy alloy

Kaiwei Zhang, Feng He, Zhongsheng Yang, Dingcong Cui, Junjie Li, Zenan Yang, Jincheng Wang, Zhijun Wang

School of Materials Sience and Engineering

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

19 Scopus citations

Abstract

The thermal stability of precipitates is a major concern for L1₂-type strengthening high entropy alloy at elevated temperatures. In this study, we systematically investigated the effect of Re and Ru on the phase stability an d coarsening kinetics of L1₂ precipitates in the Ni₂₉Co₂₇Fe₂₇Cr₃Al₇Ti₇ HEA. The L1₂ phase exhibited a high volume fraction of 40.29% in the explored HEA and remained a stable morphology during the long-term exposure. Re addition did not change the volume fraction of L1₂ phase, while Ru addition decreased it to 34.42%. Both Re and Ru facilitated the formation of L2₁ precipitates slightly. Minor Re significantly decreased the coarsening rate of L1₂ phase and minor Ru also retarded the coarsening of L1₂ phase to some degree, which were mainly ascribed to the sluggish diffusion of Re and Ru atoms. These findings provide a feasible strategy to improve the coarsening resistance of L1₂ precipitates in HEA system through sluggish atomic diffusion.

Original language	English
Article number	158904
Journal	Journal of Alloys and Compounds
Volume	866
DOIs	https://doi.org/10.1016/j.jallcom.2021.158904
State	Published - 15 Jun 2021

Keywords

Coarsening kinetics
High entropy alloy
Phase stability

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10.1016/j.jallcom.2021.158904

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title = "Effect of Re and Ru on the phase stability and coarsening kinetics of L12 phase in a Ni29Co27Fe27Cr3Al7Ti7 high entropy alloy",

abstract = "The thermal stability of precipitates is a major concern for L12-type strengthening high entropy alloy at elevated temperatures. In this study, we systematically investigated the effect of Re and Ru on the phase stability an d coarsening kinetics of L12 precipitates in the Ni29Co27Fe27Cr3Al7Ti7 HEA. The L12 phase exhibited a high volume fraction of 40.29% in the explored HEA and remained a stable morphology during the long-term exposure. Re addition did not change the volume fraction of L12 phase, while Ru addition decreased it to 34.42%. Both Re and Ru facilitated the formation of L21 precipitates slightly. Minor Re significantly decreased the coarsening rate of L12 phase and minor Ru also retarded the coarsening of L12 phase to some degree, which were mainly ascribed to the sluggish diffusion of Re and Ru atoms. These findings provide a feasible strategy to improve the coarsening resistance of L12 precipitates in HEA system through sluggish atomic diffusion.",

keywords = "Coarsening kinetics, High entropy alloy, Phase stability",

author = "Kaiwei Zhang and Feng He and Zhongsheng Yang and Dingcong Cui and Junjie Li and Zenan Yang and Jincheng Wang and Zhijun Wang",

note = "Publisher Copyright: {\textcopyright} 2021 Elsevier B.V.",

year = "2021",

month = jun,

day = "15",

doi = "10.1016/j.jallcom.2021.158904",

language = "英语",

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journal = "Journal of Alloys and Compounds",

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TY - JOUR

T1 - Effect of Re and Ru on the phase stability and coarsening kinetics of L12 phase in a Ni29Co27Fe27Cr3Al7Ti7 high entropy alloy

AU - Zhang, Kaiwei

AU - He, Feng

AU - Yang, Zhongsheng

AU - Cui, Dingcong

AU - Li, Junjie

AU - Yang, Zenan

AU - Wang, Jincheng

AU - Wang, Zhijun

PY - 2021/6/15

Y1 - 2021/6/15

N2 - The thermal stability of precipitates is a major concern for L12-type strengthening high entropy alloy at elevated temperatures. In this study, we systematically investigated the effect of Re and Ru on the phase stability an d coarsening kinetics of L12 precipitates in the Ni29Co27Fe27Cr3Al7Ti7 HEA. The L12 phase exhibited a high volume fraction of 40.29% in the explored HEA and remained a stable morphology during the long-term exposure. Re addition did not change the volume fraction of L12 phase, while Ru addition decreased it to 34.42%. Both Re and Ru facilitated the formation of L21 precipitates slightly. Minor Re significantly decreased the coarsening rate of L12 phase and minor Ru also retarded the coarsening of L12 phase to some degree, which were mainly ascribed to the sluggish diffusion of Re and Ru atoms. These findings provide a feasible strategy to improve the coarsening resistance of L12 precipitates in HEA system through sluggish atomic diffusion.

AB - The thermal stability of precipitates is a major concern for L12-type strengthening high entropy alloy at elevated temperatures. In this study, we systematically investigated the effect of Re and Ru on the phase stability an d coarsening kinetics of L12 precipitates in the Ni29Co27Fe27Cr3Al7Ti7 HEA. The L12 phase exhibited a high volume fraction of 40.29% in the explored HEA and remained a stable morphology during the long-term exposure. Re addition did not change the volume fraction of L12 phase, while Ru addition decreased it to 34.42%. Both Re and Ru facilitated the formation of L21 precipitates slightly. Minor Re significantly decreased the coarsening rate of L12 phase and minor Ru also retarded the coarsening of L12 phase to some degree, which were mainly ascribed to the sluggish diffusion of Re and Ru atoms. These findings provide a feasible strategy to improve the coarsening resistance of L12 precipitates in HEA system through sluggish atomic diffusion.

KW - Coarsening kinetics

KW - High entropy alloy

KW - Phase stability

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U2 - 10.1016/j.jallcom.2021.158904

DO - 10.1016/j.jallcom.2021.158904

M3 - 文章

AN - SCOPUS:85100441178

SN - 0925-8388

VL - 866

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

M1 - 158904

ER -

Effect of Re and Ru on the phase stability and coarsening kinetics of L1₂ phase in a Ni₂₉Co₂₇Fe₂₇Cr₃Al₇Ti₇ high entropy alloy

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Keywords

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