Dislocation array reflection enhances strain hardening of a dual-phase heterostructured high-entropy alloy

Yi Liu; Mengning Xu; Lirong Xiao; Xuefei Chen; Zhaohua Hu; Bo Gao; Ningning Liang; Yuntian Zhu; Yang Cao; Hao Zhou

doi:10.1080/21663831.2023.2208166

Author(s)

Yi Liu
Mengning Xu
Lirong Xiao
Xuefei Chen
Zhaohua Hu
Bo Gao
Ningning Liang
Yang Cao
Hao Zhou

Related Research Unit(s)

Department of Materials Science and Engineering

Detail(s)

Original language	English
Pages (from-to)	638-647
Journal / Publication	Materials Research Letters
Volume	11
Issue number	8
Online published	9 May 2023
Publication status	Published - 2023

Link(s)

DOI	DOI https://doi.org/10.1080/21663831.2023.2208166 Final Published version
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Attachment(s)	Documents 156732894.pdf Final Published version, 4.26 MB, PDF Publisher's Copyright Statement This full text is made available under CC-BY 4.0. https://creativecommons.org/licenses/by/4.0/
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-85158957175&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(5fe379d8-ec71-4e59-b8ae-837da54c2ea9).html

Abstract

Piling-ups of geometrically necessary dislocation (GND) arrays against interfaces are known to produce hetero-deformation induced (HDI) strengthening and strain hardening to enhance the strength and ductility of heterostructured materials. Here we report an interesting dislocation mechanism that can produce strong HDI hardening: consecutive reflections of GND planar piling-up arrays near the opposite phase boundaries in a heterostructured AlCoCrFeNi₂ high entropy alloy (HEA). In contrast, dislocation transmission was found at grain boundaries in the fcc phase. The discovery here provides guidance for future materials design, which may improve the combination of strength and ductility of metallic materials. © 2023 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.

Research Area(s)

deformation mechanism, Heterostructured materials, High entropy alloys, in-situ TEM, interfaces

Citation Format(s)

[ RIS ] [ BibTeX ]

Dislocation array reflection enhances strain hardening of a dual-phase heterostructured high-entropy alloy. / Liu, Yi; Xu, Mengning; Xiao, Lirong et al.
In: Materials Research Letters, Vol. 11, No. 8, 2023, p. 638-647.

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

Liu, Y, Xu, M, Xiao, L, Chen, X, Hu, Z, Gao, B, Liang, N, Zhu, Y, Cao, Y & Zhou, H 2023, 'Dislocation array reflection enhances strain hardening of a dual-phase heterostructured high-entropy alloy', Materials Research Letters, vol. 11, no. 8, pp. 638-647. https://doi.org/10.1080/21663831.2023.2208166

Liu, Y., Xu, M., Xiao, L., Chen, X., Hu, Z., Gao, B., Liang, N., Zhu, Y., Cao, Y., & Zhou, H. (2023). Dislocation array reflection enhances strain hardening of a dual-phase heterostructured high-entropy alloy. Materials Research Letters, 11(8), 638-647. https://doi.org/10.1080/21663831.2023.2208166

Liu Y, Xu M, Xiao L, Chen X, Hu Z, Gao B et al. Dislocation array reflection enhances strain hardening of a dual-phase heterostructured high-entropy alloy. Materials Research Letters. 2023;11(8):638-647. Epub 2023 May 9. doi: 10.1080/21663831.2023.2208166

Liu, Yi ; Xu, Mengning ; Xiao, Lirong et al. / Dislocation array reflection enhances strain hardening of a dual-phase heterostructured high-entropy alloy. In: Materials Research Letters. 2023 ; Vol. 11, No. 8. pp. 638-647.

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