Hot Deformation and Subsequent Annealing on the Microstructure and Hardness of an Al0.3CoCrFeNi High-entropy Alloy

Jun Wang; Hongchao Li; Haoxue Yang; Yu Zhang; William Yi Wang; Jinshan Li

doi:10.1007/s40195-021-01251-z

Hot Deformation and Subsequent Annealing on the Microstructure and Hardness of an Al_0.3CoCrFeNi High-entropy Alloy

Jun Wang, Hongchao Li, Haoxue Yang, Yu Zhang, William Yi Wang, Jinshan Li

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

23 Scopus citations

Abstract

The influence of simple thermomechanical processing such as hot deformation and heat treatment on the microstructure and hardness of an Al_0.3CoCrFeNi high-entropy alloy has been investigated. Results show that the relatively high deformation temperature can induce discontinuous dynamic recrystallization with fine grains initially nucleating at the elongated grain boundaries. The transition from partial recrystallization to fully recrystallization, as well as the precipitation behavior after annealing, has been described in detail. Both bcc precipitation and completely recrystallized grains can be observed after annealing at 1000 °C. Based on detailed microstructure analysis, the decrease in hardness value is shown to be related to both dynamic recrystallization and dynamic recovery which lead to softening.

Original language	English
Pages (from-to)	1527-1536
Number of pages	10
Journal	Acta Metallurgica Sinica (English Letters)
Volume	34
Issue number	11
DOIs	https://doi.org/10.1007/s40195-021-01251-z
State	Published - Nov 2021

Keywords

Annealing
High-entropy alloy
Hot deformation
Microstructure
Recrystallization

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title = "Hot Deformation and Subsequent Annealing on the Microstructure and Hardness of an Al0.3CoCrFeNi High-entropy Alloy",

abstract = "The influence of simple thermomechanical processing such as hot deformation and heat treatment on the microstructure and hardness of an Al0.3CoCrFeNi high-entropy alloy has been investigated. Results show that the relatively high deformation temperature can induce discontinuous dynamic recrystallization with fine grains initially nucleating at the elongated grain boundaries. The transition from partial recrystallization to fully recrystallization, as well as the precipitation behavior after annealing, has been described in detail. Both bcc precipitation and completely recrystallized grains can be observed after annealing at 1000 °C. Based on detailed microstructure analysis, the decrease in hardness value is shown to be related to both dynamic recrystallization and dynamic recovery which lead to softening.",

keywords = "Annealing, High-entropy alloy, Hot deformation, Microstructure, Recrystallization",

author = "Jun Wang and Hongchao Li and Haoxue Yang and Yu Zhang and Wang, {William Yi} and Jinshan Li",

note = "Publisher Copyright: {\textcopyright} 2021, The Chinese Society for Metals (CSM) and Springer-Verlag GmbH Germany, part of Springer Nature.",

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T1 - Hot Deformation and Subsequent Annealing on the Microstructure and Hardness of an Al0.3CoCrFeNi High-entropy Alloy

AU - Wang, Jun

AU - Li, Hongchao

AU - Yang, Haoxue

AU - Zhang, Yu

AU - Wang, William Yi

AU - Li, Jinshan

PY - 2021/11

Y1 - 2021/11

N2 - The influence of simple thermomechanical processing such as hot deformation and heat treatment on the microstructure and hardness of an Al0.3CoCrFeNi high-entropy alloy has been investigated. Results show that the relatively high deformation temperature can induce discontinuous dynamic recrystallization with fine grains initially nucleating at the elongated grain boundaries. The transition from partial recrystallization to fully recrystallization, as well as the precipitation behavior after annealing, has been described in detail. Both bcc precipitation and completely recrystallized grains can be observed after annealing at 1000 °C. Based on detailed microstructure analysis, the decrease in hardness value is shown to be related to both dynamic recrystallization and dynamic recovery which lead to softening.

AB - The influence of simple thermomechanical processing such as hot deformation and heat treatment on the microstructure and hardness of an Al0.3CoCrFeNi high-entropy alloy has been investigated. Results show that the relatively high deformation temperature can induce discontinuous dynamic recrystallization with fine grains initially nucleating at the elongated grain boundaries. The transition from partial recrystallization to fully recrystallization, as well as the precipitation behavior after annealing, has been described in detail. Both bcc precipitation and completely recrystallized grains can be observed after annealing at 1000 °C. Based on detailed microstructure analysis, the decrease in hardness value is shown to be related to both dynamic recrystallization and dynamic recovery which lead to softening.

KW - Annealing

KW - High-entropy alloy

KW - Hot deformation

KW - Microstructure

KW - Recrystallization

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JO - Acta Metallurgica Sinica (English Letters)

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Hot Deformation and Subsequent Annealing on the Microstructure and Hardness of an Al_0.3CoCrFeNi High-entropy Alloy

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