Overcoming strength-toughness trade-off in a eutectic high entropy alloy by optimizing chemical and microstructural heterogeneities

Zhaoqi Chen; Wenqing Zhu; Hang Wang; Quanfeng He; Qihong Fang; Xiaodi Liu; Jia Li; Yong Yang

doi:10.1038/s43246-024-00450-2

Overcoming strength-toughness trade-off in a eutectic high entropy alloy by optimizing chemical and microstructural heterogeneities

Zhaoqi Chen, Wenqing Zhu, Hang Wang, Quanfeng He, Qihong Fang, Xiaodi Liu, Jia Li^*, Yong Yang^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

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Abstract

The well-known strength-toughness trade-off has long been an obstacle in the pursuit of advanced structural alloys. Here, we develop a eutectic high entropy alloy that effectively overcomes this limitation. Our alloy is composed of face-centered cubic and body-centered cubic crystalline phases, and demonstrates attractive mechanical properties by harnessing microstructural hybridization and a strain-induced phase transition between phases. Unlike conventional eutectic alloys, the compositionally complexity of our alloy allows control of its microstructural and chemical heterogeneities across multiple length scales, ranging from atomic- and nano-scales to meso-scales. Optimizing these microstructural and chemical heterogeneities within our alloy enables high strength and ductility because of enhanced fracture resistance, outperforming alternative high and medium entropy alloys with similar compositions and microstructures.

© The Author(s) 2024

Original language	English
Article number	12
Journal	Communications Materials
Volume	5
Online published	3 Feb 2024
DOIs	https://doi.org/10.1038/s43246-024-00450-2
Publication status	Published - 2024

Funding

Y.Y. acknowledges the financial support provided by the Research Grants Council, the Hong Kong Government, through the General Research Fund with the grant numbers (CityU 11201721, CityU11206362).

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This full text is made available under CC-BY 4.0. https://creativecommons.org/licenses/by/4.0/

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RGC-funded

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10.1038/s43246-024-00450-2

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GRF: Development of Hysteresis Free Super-Elastic High Entropy Alloys: From Fundamental Understanding to Alloy Design
YANG, Y. (Principal Investigator / Project Coordinator), PAO, C. W. (Co-Investigator) & Zeng, Q. (Co-Investigator)
1/01/22 → 10/12/25
Project: Research

Cite this

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title = "Overcoming strength-toughness trade-off in a eutectic high entropy alloy by optimizing chemical and microstructural heterogeneities",

abstract = "The well-known strength-toughness trade-off has long been an obstacle in the pursuit of advanced structural alloys. Here, we develop a eutectic high entropy alloy that effectively overcomes this limitation. Our alloy is composed of face-centered cubic and body-centered cubic crystalline phases, and demonstrates attractive mechanical properties by harnessing microstructural hybridization and a strain-induced phase transition between phases. Unlike conventional eutectic alloys, the compositionally complexity of our alloy allows control of its microstructural and chemical heterogeneities across multiple length scales, ranging from atomic- and nano-scales to meso-scales. Optimizing these microstructural and chemical heterogeneities within our alloy enables high strength and ductility because of enhanced fracture resistance, outperforming alternative high and medium entropy alloys with similar compositions and microstructures.{\textcopyright} The Author(s) 2024",

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language = "English",

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journal = "Communications Materials",

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T1 - Overcoming strength-toughness trade-off in a eutectic high entropy alloy by optimizing chemical and microstructural heterogeneities

AU - Chen, Zhaoqi

AU - Zhu, Wenqing

AU - Wang, Hang

AU - He, Quanfeng

AU - Fang, Qihong

AU - Liu, Xiaodi

AU - Li, Jia

AU - Yang, Yong

PY - 2024

Y1 - 2024

N2 - The well-known strength-toughness trade-off has long been an obstacle in the pursuit of advanced structural alloys. Here, we develop a eutectic high entropy alloy that effectively overcomes this limitation. Our alloy is composed of face-centered cubic and body-centered cubic crystalline phases, and demonstrates attractive mechanical properties by harnessing microstructural hybridization and a strain-induced phase transition between phases. Unlike conventional eutectic alloys, the compositionally complexity of our alloy allows control of its microstructural and chemical heterogeneities across multiple length scales, ranging from atomic- and nano-scales to meso-scales. Optimizing these microstructural and chemical heterogeneities within our alloy enables high strength and ductility because of enhanced fracture resistance, outperforming alternative high and medium entropy alloys with similar compositions and microstructures.© The Author(s) 2024

AB - The well-known strength-toughness trade-off has long been an obstacle in the pursuit of advanced structural alloys. Here, we develop a eutectic high entropy alloy that effectively overcomes this limitation. Our alloy is composed of face-centered cubic and body-centered cubic crystalline phases, and demonstrates attractive mechanical properties by harnessing microstructural hybridization and a strain-induced phase transition between phases. Unlike conventional eutectic alloys, the compositionally complexity of our alloy allows control of its microstructural and chemical heterogeneities across multiple length scales, ranging from atomic- and nano-scales to meso-scales. Optimizing these microstructural and chemical heterogeneities within our alloy enables high strength and ductility because of enhanced fracture resistance, outperforming alternative high and medium entropy alloys with similar compositions and microstructures.© The Author(s) 2024

U2 - 10.1038/s43246-024-00450-2

DO - 10.1038/s43246-024-00450-2

M3 - RGC 21 - Publication in refereed journal

SN - 2662-4443

VL - 5

JO - Communications Materials

JF - Communications Materials

M1 - 12

ER -

Overcoming strength-toughness trade-off in a eutectic high entropy alloy by optimizing chemical and microstructural heterogeneities

Abstract

Funding

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Projects

GRF: Development of Hysteresis Free Super-Elastic High Entropy Alloys: From Fundamental Understanding to Alloy Design

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