Tailoring microstructures of CoCrFeNiNb0.25 hypoeutectic high-entropy alloy by hot deformation

Xiao Rong Liu; Feng He; Jun Jie Li; Ying Ying Dang; Zhi Jun Wang; Jin Cheng Wang

doi:10.1007/s12598-021-01932-9

Tailoring microstructures of CoCrFeNiNb_0.25 hypoeutectic high-entropy alloy by hot deformation

Xiao Rong Liu, Feng He, Jun Jie Li, Ying Ying Dang, Zhi Jun Wang, Jin Cheng Wang

School of Materials Sience and Engineering

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

22 Scopus citations

Abstract

CoCrFeNiNb_0.25 hypoeutectic high-entropy alloy (HEA) has shown good mechanical properties. However, due to interdendritic eutectics, it is challenging to further optimize the microstructure through cold rolling and annealing. The current study showed that hot deformation effectively tailored the hypoeutectic microstructure. We investigated the hot deformation behavior and microstructure evolution of the dual-phase CoCrFeNiNb_0.25 HEA at different temperatures from 800 to 1000 °C and different strain rates from 0.01 to 10.00 s⁻¹. The systematic investigation showed the deformation activation energy around 500 kJ·mol⁻¹. Microstructure with refined grains and uniformly distributed Laves phases can be obtained after 70% compression at 900 °C with a strain rate of 0.01 s⁻¹. Graphical abstract: [Figure not available: see fulltext.]

Original language	English
Pages (from-to)	2028-2037
Number of pages	10
Journal	Rare Metals
Volume	41
Issue number	6
DOIs	https://doi.org/10.1007/s12598-021-01932-9
State	Published - Jun 2022

Keywords

High-entropy alloy
Hot deformation
Microstructure evolution

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10.1007/s12598-021-01932-9

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title = "Tailoring microstructures of CoCrFeNiNb0.25 hypoeutectic high-entropy alloy by hot deformation",

abstract = "CoCrFeNiNb0.25 hypoeutectic high-entropy alloy (HEA) has shown good mechanical properties. However, due to interdendritic eutectics, it is challenging to further optimize the microstructure through cold rolling and annealing. The current study showed that hot deformation effectively tailored the hypoeutectic microstructure. We investigated the hot deformation behavior and microstructure evolution of the dual-phase CoCrFeNiNb0.25 HEA at different temperatures from 800 to 1000 °C and different strain rates from 0.01 to 10.00 s−1. The systematic investigation showed the deformation activation energy around 500 kJ·mol−1. Microstructure with refined grains and uniformly distributed Laves phases can be obtained after 70% compression at 900 °C with a strain rate of 0.01 s−1. Graphical abstract: [Figure not available: see fulltext.]",

keywords = "High-entropy alloy, Hot deformation, Microstructure evolution",

author = "Liu, {Xiao Rong} and Feng He and Li, {Jun Jie} and Dang, {Ying Ying} and Wang, {Zhi Jun} and Wang, {Jin Cheng}",

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year = "2022",

month = jun,

doi = "10.1007/s12598-021-01932-9",

language = "英语",

volume = "41",

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T1 - Tailoring microstructures of CoCrFeNiNb0.25 hypoeutectic high-entropy alloy by hot deformation

AU - Liu, Xiao Rong

AU - He, Feng

AU - Li, Jun Jie

AU - Dang, Ying Ying

AU - Wang, Zhi Jun

AU - Wang, Jin Cheng

PY - 2022/6

Y1 - 2022/6

N2 - CoCrFeNiNb0.25 hypoeutectic high-entropy alloy (HEA) has shown good mechanical properties. However, due to interdendritic eutectics, it is challenging to further optimize the microstructure through cold rolling and annealing. The current study showed that hot deformation effectively tailored the hypoeutectic microstructure. We investigated the hot deformation behavior and microstructure evolution of the dual-phase CoCrFeNiNb0.25 HEA at different temperatures from 800 to 1000 °C and different strain rates from 0.01 to 10.00 s−1. The systematic investigation showed the deformation activation energy around 500 kJ·mol−1. Microstructure with refined grains and uniformly distributed Laves phases can be obtained after 70% compression at 900 °C with a strain rate of 0.01 s−1. Graphical abstract: [Figure not available: see fulltext.]

AB - CoCrFeNiNb0.25 hypoeutectic high-entropy alloy (HEA) has shown good mechanical properties. However, due to interdendritic eutectics, it is challenging to further optimize the microstructure through cold rolling and annealing. The current study showed that hot deformation effectively tailored the hypoeutectic microstructure. We investigated the hot deformation behavior and microstructure evolution of the dual-phase CoCrFeNiNb0.25 HEA at different temperatures from 800 to 1000 °C and different strain rates from 0.01 to 10.00 s−1. The systematic investigation showed the deformation activation energy around 500 kJ·mol−1. Microstructure with refined grains and uniformly distributed Laves phases can be obtained after 70% compression at 900 °C with a strain rate of 0.01 s−1. Graphical abstract: [Figure not available: see fulltext.]

KW - High-entropy alloy

KW - Hot deformation

KW - Microstructure evolution

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U2 - 10.1007/s12598-021-01932-9

DO - 10.1007/s12598-021-01932-9

M3 - 文章

AN - SCOPUS:85125493214

SN - 1001-0521

VL - 41

SP - 2028

EP - 2037

JO - Rare Metals

JF - Rare Metals

IS - 6

ER -

Tailoring microstructures of CoCrFeNiNb_0.25 hypoeutectic high-entropy alloy by hot deformation

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Keywords

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