Unveiling microstructural origins of the balanced strength-ductility combination in eutectic high-entropy alloys at cryogenic temperatures

Yi Li; Peijian Shi; Mingyang Wang; Yinpan Yang; Yan Wang; Yiqi Li; Yuebo Wen; Weili Ren; Na Min; Yan Chen; Yifeng Guo; Zhe Shen; Tianxiang Zheng; Ningning Liang; Wenjun Lu; Peter K. Liaw; Yunbo Zhong; Yuntian Zhu

doi:10.1080/21663831.2022.2078169

Unveiling microstructural origins of the balanced strength-ductility combination in eutectic high-entropy alloys at cryogenic temperatures

Yi Li, Peijian Shi^*, Mingyang Wang, Yinpan Yang, Yan Wang, Yiqi Li, Yuebo Wen, Weili Ren, Na Min, Yan Chen, Yifeng Guo^*, Zhe Shen, Tianxiang Zheng, Ningning Liang, Wenjun Lu, Peter K. Liaw, Yunbo Zhong^*, Yuntian Zhu

^*Corresponding author for this work

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

23 Citations (Scopus)

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Abstract

Eutectic high-entropy alloys (EHEAs) feature attractive strength-ductility balance at both ambient and cryogenic temperatures. Nevertheless, microstructural origins underpinning these balanced mechanical properties remain elusive. Here the deformation mechanisms of a recently-reported Al₁₉Co₂₀Fe₂₀Ni₄₁ EHEA were comparatively investigated at 298 and 77 K, which revealed a high frequency and density of dislocation multi-slip scenario in the soft eutectic lamellae and the corresponding compatible co-deformation in the adjacent hard lamellae that collectively endowed strong hetero-deformation-induced (HDI) hardening and excellent forest-dislocation hardening. Therefore, better ductility and tensile strength, in comparison to the other widely-studied EHEA system, could be sustained even at liquid-nitrogen temperatures.

Original language	English
Pages (from-to)	602-610
Journal	Materials Research Letters
Volume	10
Issue number	9
Online published	25 May 2022
DOIs	https://doi.org/10.1080/21663831.2022.2078169
Publication status	Published - Sept 2022

Research Keywords

Eutectic high-entropy alloys
mechanical properties
multi-slip scenario
compatible co-deformation
HDI hardening
SHORT-RANGE ORDER
DEFORMATION
FRACTURE

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Li, Y., Shi, P., Wang, M., Yang, Y., Wang, Y., Li, Y., Wen, Y., Ren, W., Min, N., Chen, Y., Guo, Y., Shen, Z., Zheng, T., Liang, N., Lu, W., Liaw, P. K., Zhong, Y., & Zhu, Y. (2022). Unveiling microstructural origins of the balanced strength-ductility combination in eutectic high-entropy alloys at cryogenic temperatures. Materials Research Letters, 10(9), 602-610. https://doi.org/10.1080/21663831.2022.2078169

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title = "Unveiling microstructural origins of the balanced strength-ductility combination in eutectic high-entropy alloys at cryogenic temperatures",

abstract = "Eutectic high-entropy alloys (EHEAs) feature attractive strength-ductility balance at both ambient and cryogenic temperatures. Nevertheless, microstructural origins underpinning these balanced mechanical properties remain elusive. Here the deformation mechanisms of a recently-reported Al19Co20Fe20Ni41 EHEA were comparatively investigated at 298 and 77 K, which revealed a high frequency and density of dislocation multi-slip scenario in the soft eutectic lamellae and the corresponding compatible co-deformation in the adjacent hard lamellae that collectively endowed strong hetero-deformation-induced (HDI) hardening and excellent forest-dislocation hardening. Therefore, better ductility and tensile strength, in comparison to the other widely-studied EHEA system, could be sustained even at liquid-nitrogen temperatures.",

keywords = "Eutectic high-entropy alloys, mechanical properties, multi-slip scenario, compatible co-deformation, HDI hardening, SHORT-RANGE ORDER, DEFORMATION, FRACTURE",

author = "Yi Li and Peijian Shi and Mingyang Wang and Yinpan Yang and Yan Wang and Yiqi Li and Yuebo Wen and Weili Ren and Na Min and Yan Chen and Yifeng Guo and Zhe Shen and Tianxiang Zheng and Ningning Liang and Wenjun Lu and Liaw, {Peter K.} and Yunbo Zhong and Yuntian Zhu",

year = "2022",

month = sep,

doi = "10.1080/21663831.2022.2078169",

language = "English",

volume = "10",

pages = "602--610",

journal = "Materials Research Letters",

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Li, Y, Shi, P, Wang, M, Yang, Y, Wang, Y, Li, Y, Wen, Y, Ren, W, Min, N, Chen, Y, Guo, Y, Shen, Z, Zheng, T, Liang, N, Lu, W, Liaw, PK, Zhong, Y & Zhu, Y 2022, 'Unveiling microstructural origins of the balanced strength-ductility combination in eutectic high-entropy alloys at cryogenic temperatures', Materials Research Letters, vol. 10, no. 9, pp. 602-610. https://doi.org/10.1080/21663831.2022.2078169

TY - JOUR

T1 - Unveiling microstructural origins of the balanced strength-ductility combination in eutectic high-entropy alloys at cryogenic temperatures

AU - Li, Yi

AU - Shi, Peijian

AU - Wang, Mingyang

AU - Yang, Yinpan

AU - Wang, Yan

AU - Li, Yiqi

AU - Wen, Yuebo

AU - Ren, Weili

AU - Min, Na

AU - Chen, Yan

AU - Guo, Yifeng

AU - Shen, Zhe

AU - Zheng, Tianxiang

AU - Liang, Ningning

AU - Lu, Wenjun

AU - Liaw, Peter K.

AU - Zhong, Yunbo

AU - Zhu, Yuntian

PY - 2022/9

Y1 - 2022/9

N2 - Eutectic high-entropy alloys (EHEAs) feature attractive strength-ductility balance at both ambient and cryogenic temperatures. Nevertheless, microstructural origins underpinning these balanced mechanical properties remain elusive. Here the deformation mechanisms of a recently-reported Al19Co20Fe20Ni41 EHEA were comparatively investigated at 298 and 77 K, which revealed a high frequency and density of dislocation multi-slip scenario in the soft eutectic lamellae and the corresponding compatible co-deformation in the adjacent hard lamellae that collectively endowed strong hetero-deformation-induced (HDI) hardening and excellent forest-dislocation hardening. Therefore, better ductility and tensile strength, in comparison to the other widely-studied EHEA system, could be sustained even at liquid-nitrogen temperatures.

AB - Eutectic high-entropy alloys (EHEAs) feature attractive strength-ductility balance at both ambient and cryogenic temperatures. Nevertheless, microstructural origins underpinning these balanced mechanical properties remain elusive. Here the deformation mechanisms of a recently-reported Al19Co20Fe20Ni41 EHEA were comparatively investigated at 298 and 77 K, which revealed a high frequency and density of dislocation multi-slip scenario in the soft eutectic lamellae and the corresponding compatible co-deformation in the adjacent hard lamellae that collectively endowed strong hetero-deformation-induced (HDI) hardening and excellent forest-dislocation hardening. Therefore, better ductility and tensile strength, in comparison to the other widely-studied EHEA system, could be sustained even at liquid-nitrogen temperatures.

KW - Eutectic high-entropy alloys

KW - mechanical properties

KW - multi-slip scenario

KW - compatible co-deformation

KW - HDI hardening

KW - SHORT-RANGE ORDER

KW - DEFORMATION

KW - FRACTURE

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U2 - 10.1080/21663831.2022.2078169

DO - 10.1080/21663831.2022.2078169

M3 - RGC 21 - Publication in refereed journal

SN - 2166-3831

VL - 10

SP - 602

EP - 610

JO - Materials Research Letters

JF - Materials Research Letters

IS - 9

ER -

Unveiling microstructural origins of the balanced strength-ductility combination in eutectic high-entropy alloys at cryogenic temperatures

Abstract

Research Keywords

Publisher's Copyright Statement

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