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

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

12 Scopus Citations
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Author(s)

  • 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

Detail(s)

Original languageEnglish
Pages (from-to)602-610
Journal / PublicationMaterials Research Letters
Volume10
Issue number9
Online published25 May 2022
Publication statusPublished - Sept 2022

Link(s)

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.

Research Area(s)

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

Citation Format(s)

Unveiling microstructural origins of the balanced strength-ductility combination in eutectic high-entropy alloys at cryogenic temperatures. / Li, Yi; Shi, Peijian; Wang, Mingyang et al.
In: Materials Research Letters, Vol. 10, No. 9, 09.2022, p. 602-610.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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