Nanoscale B2 precipitation and strengthening behavior in Al0.5CoCrFeNi high-entropy alloy

Hongchao Li; Jun Wang; Haoxue Yang; Mengmeng Zhao; William Yi Wang; Ruihao Yuan; Jinshan Li

doi:10.1016/j.matchar.2022.112156

Nanoscale B2 precipitation and strengthening behavior in Al_0.5CoCrFeNi high-entropy alloy

Hongchao Li, Jun Wang, Haoxue Yang, Mengmeng Zhao, William Yi Wang, Ruihao Yuan, Jinshan Li

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

22 Scopus citations

Abstract

The precipitation hardening high-entropy alloys (HEAs) have attracted extensive research interest for their enhanced strength yet considerable ductility. In this study, the Al_0.5CoCrFeNi HEA strengthened by nanoscale B2 phases was obtained after aging at temperature of 800 °C – 900 °C. The evolution of the B2 precipitation and the mechanical properties of Al_0.5CoCrFeNi alloy were investigated after different thermomechanical treatments. The volume fraction and the length–width ratio of the B2 phases in the alloy increase with the increase of the aging time. After aging at 850 °C for 16 h, the yield strength of the alloy reaches 514 MPa via Orowan strengthening mechanism of the B2 phases. Additionally, the introduction of pre-deformation before aging promotes the formation of B2 phases, which results in strength enhancement of the alloy via precipitation strengthening and work hardening.

Original language	English
Article number	112156
Journal	Materials Characterization
Volume	191
DOIs	https://doi.org/10.1016/j.matchar.2022.112156
State	Published - Sep 2022

Keywords

B2 phase
High-entropy alloy
Mechanical property
Precipitation strengthening

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10.1016/j.matchar.2022.112156

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title = "Nanoscale B2 precipitation and strengthening behavior in Al0.5CoCrFeNi high-entropy alloy",

abstract = "The precipitation hardening high-entropy alloys (HEAs) have attracted extensive research interest for their enhanced strength yet considerable ductility. In this study, the Al0.5CoCrFeNi HEA strengthened by nanoscale B2 phases was obtained after aging at temperature of 800 °C – 900 °C. The evolution of the B2 precipitation and the mechanical properties of Al0.5CoCrFeNi alloy were investigated after different thermomechanical treatments. The volume fraction and the length–width ratio of the B2 phases in the alloy increase with the increase of the aging time. After aging at 850 °C for 16 h, the yield strength of the alloy reaches 514 MPa via Orowan strengthening mechanism of the B2 phases. Additionally, the introduction of pre-deformation before aging promotes the formation of B2 phases, which results in strength enhancement of the alloy via precipitation strengthening and work hardening.",

keywords = "B2 phase, High-entropy alloy, Mechanical property, Precipitation strengthening",

author = "Hongchao Li and Jun Wang and Haoxue Yang and Mengmeng Zhao and Wang, {William Yi} and Ruihao Yuan and Jinshan Li",

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T1 - Nanoscale B2 precipitation and strengthening behavior in Al0.5CoCrFeNi high-entropy alloy

AU - Li, Hongchao

AU - Wang, Jun

AU - Yang, Haoxue

AU - Zhao, Mengmeng

AU - Wang, William Yi

AU - Yuan, Ruihao

AU - Li, Jinshan

PY - 2022/9

Y1 - 2022/9

N2 - The precipitation hardening high-entropy alloys (HEAs) have attracted extensive research interest for their enhanced strength yet considerable ductility. In this study, the Al0.5CoCrFeNi HEA strengthened by nanoscale B2 phases was obtained after aging at temperature of 800 °C – 900 °C. The evolution of the B2 precipitation and the mechanical properties of Al0.5CoCrFeNi alloy were investigated after different thermomechanical treatments. The volume fraction and the length–width ratio of the B2 phases in the alloy increase with the increase of the aging time. After aging at 850 °C for 16 h, the yield strength of the alloy reaches 514 MPa via Orowan strengthening mechanism of the B2 phases. Additionally, the introduction of pre-deformation before aging promotes the formation of B2 phases, which results in strength enhancement of the alloy via precipitation strengthening and work hardening.

AB - The precipitation hardening high-entropy alloys (HEAs) have attracted extensive research interest for their enhanced strength yet considerable ductility. In this study, the Al0.5CoCrFeNi HEA strengthened by nanoscale B2 phases was obtained after aging at temperature of 800 °C – 900 °C. The evolution of the B2 precipitation and the mechanical properties of Al0.5CoCrFeNi alloy were investigated after different thermomechanical treatments. The volume fraction and the length–width ratio of the B2 phases in the alloy increase with the increase of the aging time. After aging at 850 °C for 16 h, the yield strength of the alloy reaches 514 MPa via Orowan strengthening mechanism of the B2 phases. Additionally, the introduction of pre-deformation before aging promotes the formation of B2 phases, which results in strength enhancement of the alloy via precipitation strengthening and work hardening.

KW - B2 phase

KW - High-entropy alloy

KW - Mechanical property

KW - Precipitation strengthening

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DO - 10.1016/j.matchar.2022.112156

M3 - 文章

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SN - 1044-5803

VL - 191

JO - Materials Characterization

JF - Materials Characterization

M1 - 112156

ER -

Nanoscale B2 precipitation and strengthening behavior in Al_0.5CoCrFeNi high-entropy alloy

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Keywords

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