High strength and ductility in a dual-phase hetero-structured AlCoCrFeNi2.1 eutectic high-entropy alloy by powder metallurgy

Siyuan Peng; Shuai Feng; Zhenfei Jiang; Jie Ren; Shengbiao Zhang; Yanfang Liu; Liang Zhang; Wenyi He; Zhongqiang Liu; Shuai Guan; Zhiyu Xiao; Wen Chen

doi:10.1080/21663831.2024.2332608

Materials Research Letters (May 2024)

High strength and ductility in a dual-phase hetero-structured AlCoCrFeNi2.1 eutectic high-entropy alloy by powder metallurgy

Siyuan Peng,
Shuai Feng,
Zhenfei Jiang,
Jie Ren,
Shengbiao Zhang,
Yanfang Liu,
Liang Zhang,
Wenyi He,
Zhongqiang Liu,
Shuai Guan,
Zhiyu Xiao,
Wen Chen

Affiliations

Siyuan Peng: Fujian Key Laboratory of Functional Materials and Applications, School of Materials Science and Engineering, Xiamen University of Technology, Xiamen, People’s Republic of China
Shuai Feng: Department of Mechanical and Industrial Engineering, University of Massachusetts, Amherst, MA, USA
Zhenfei Jiang: National Engineering Research Center of Near-Net-Shape Forming for Metallic Materials, South China University of Technology, Guangzhou, People’s Republic of China
Jie Ren: Department of Mechanical and Industrial Engineering, University of Massachusetts, Amherst, MA, USA
Shengbiao Zhang: Department of Mechanical and Industrial Engineering, University of Massachusetts, Amherst, MA, USA
Yanfang Liu: School of Materials Science and Engineering, Hohai University, Changzhou, People’s Republic of China
Liang Zhang: Fujian Key Laboratory of Functional Materials and Applications, School of Materials Science and Engineering, Xiamen University of Technology, Xiamen, People’s Republic of China
Wenyi He: National Engineering Research Center of Near-Net-Shape Forming for Metallic Materials, South China University of Technology, Guangzhou, People’s Republic of China
Zhongqiang Liu: National Engineering Research Center of Near-Net-Shape Forming for Metallic Materials, South China University of Technology, Guangzhou, People’s Republic of China
Shuai Guan: Department of Mechanical and Industrial Engineering, University of Massachusetts, Amherst, MA, USA
Zhiyu Xiao: National Engineering Research Center of Near-Net-Shape Forming for Metallic Materials, South China University of Technology, Guangzhou, People’s Republic of China
Wen Chen: Department of Mechanical and Industrial Engineering, University of Massachusetts, Amherst, MA, USA

DOI: https://doi.org/10.1080/21663831.2024.2332608
Journal volume & issue: Vol. 12, no. 5
pp. 363 – 372

Abstract

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We used powder hot extrusion followed by annealing to fabricate a dual-phase AlCoCrFeNi2.1 eutectic high-entropy alloy consisting of both non-recrystallized and recrystallized grains with dense nano-sized precipitates arranged in heterogeneous structures. The resulting alloy exhibits superior tensile properties with a yield strength of ∼1.2 GPa, an ultimate tensile strength of ∼1.5 GPa, and a uniform elongation of ∼18%. Such multiscale microstructure results in exceptional strain hardening of the AlCoCrFeNi2.1 alloy by activating remarkable hetero-deformation induced (HDI) stresses. Our study provides an effective approach to fabricating high-performance structural materials via dual-phase heterogeneous microstructure design.

Published in Materials Research Letters

ISSN: 2166-3831 (Online)
Publisher: Taylor & Francis Group
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.tandfonline.com/journals/tmrl

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