Fully Recrystallized Al0.5CoCrFeNi High-Entropy Alloy Strengthened by Nanoscale Precipitates

Haoxue Yang; Jinshan Li; Tong Guo; William Yi Wang; Hongchao Kou; Jun Wang

doi:10.1007/s12540-019-00284-5

Fully Recrystallized Al_0.5CoCrFeNi High-Entropy Alloy Strengthened by Nanoscale Precipitates

Haoxue Yang, Jinshan Li, Tong Guo, William Yi Wang, Hongchao Kou, Jun Wang

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

34 Scopus citations

Abstract

The correlation among the strength, ductility and precipitates in a dual-phase Al_0.5CoCrFeNi high-entropy alloy has been investigated. The property of plastic was improved in the recrystallized Al_0.5CoCrFeNi HEA prepared as the master alloy. Formation of the stable nanosized L1₂ phases after aging at 650 °C was revealed, along with the lath-like BCC phases precipitated in the grain, as the primary contribution of the strength enhancement. Excellent balanced tensile properties at room temperature were achieved through aging treatment, as the yield strength and ultimate tensile strength show 2.68, 1.63 times higher in 650 °C/140 h aged condition than that in initial states, respectively, superior to many high-entropy alloys and conventional alloys.

Original language	English
Pages (from-to)	1145-1150
Number of pages	6
Journal	Metals and Materials International
Volume	25
Issue number	5
DOIs	https://doi.org/10.1007/s12540-019-00284-5
State	Published - 6 Sep 2019

Keywords

High-entropy alloy
L1 Phase
Mechanical properties
Precipitation strengthening

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10.1007/s12540-019-00284-5

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title = "Fully Recrystallized Al0.5CoCrFeNi High-Entropy Alloy Strengthened by Nanoscale Precipitates",

abstract = "The correlation among the strength, ductility and precipitates in a dual-phase Al0.5CoCrFeNi high-entropy alloy has been investigated. The property of plastic was improved in the recrystallized Al0.5CoCrFeNi HEA prepared as the master alloy. Formation of the stable nanosized L12 phases after aging at 650 °C was revealed, along with the lath-like BCC phases precipitated in the grain, as the primary contribution of the strength enhancement. Excellent balanced tensile properties at room temperature were achieved through aging treatment, as the yield strength and ultimate tensile strength show 2.68, 1.63 times higher in 650 °C/140 h aged condition than that in initial states, respectively, superior to many high-entropy alloys and conventional alloys.",

keywords = "High-entropy alloy, L1 Phase, Mechanical properties, Precipitation strengthening",

author = "Haoxue Yang and Jinshan Li and Tong Guo and Wang, {William Yi} and Hongchao Kou and Jun Wang",

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T1 - Fully Recrystallized Al0.5CoCrFeNi High-Entropy Alloy Strengthened by Nanoscale Precipitates

AU - Yang, Haoxue

AU - Li, Jinshan

AU - Guo, Tong

AU - Wang, William Yi

AU - Kou, Hongchao

AU - Wang, Jun

PY - 2019/9/6

Y1 - 2019/9/6

N2 - The correlation among the strength, ductility and precipitates in a dual-phase Al0.5CoCrFeNi high-entropy alloy has been investigated. The property of plastic was improved in the recrystallized Al0.5CoCrFeNi HEA prepared as the master alloy. Formation of the stable nanosized L12 phases after aging at 650 °C was revealed, along with the lath-like BCC phases precipitated in the grain, as the primary contribution of the strength enhancement. Excellent balanced tensile properties at room temperature were achieved through aging treatment, as the yield strength and ultimate tensile strength show 2.68, 1.63 times higher in 650 °C/140 h aged condition than that in initial states, respectively, superior to many high-entropy alloys and conventional alloys.

AB - The correlation among the strength, ductility and precipitates in a dual-phase Al0.5CoCrFeNi high-entropy alloy has been investigated. The property of plastic was improved in the recrystallized Al0.5CoCrFeNi HEA prepared as the master alloy. Formation of the stable nanosized L12 phases after aging at 650 °C was revealed, along with the lath-like BCC phases precipitated in the grain, as the primary contribution of the strength enhancement. Excellent balanced tensile properties at room temperature were achieved through aging treatment, as the yield strength and ultimate tensile strength show 2.68, 1.63 times higher in 650 °C/140 h aged condition than that in initial states, respectively, superior to many high-entropy alloys and conventional alloys.

KW - High-entropy alloy

KW - L1 Phase

KW - Mechanical properties

KW - Precipitation strengthening

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JO - Metals and Materials International

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Fully Recrystallized Al_0.5CoCrFeNi High-Entropy Alloy Strengthened by Nanoscale Precipitates

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Keywords

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