A nano-sized precipitate strengthened medium entropy alloy with superior strength-ductility synergy and exceptional corrosion resistance

Zhimin Pan; Hong Luo; Hongxu Cheng; Qiancheng Zhao; Xuefei Wang; Yu Fu; Yicong Ma; Xiaogang Li

doi:10.1016/j.mtphys.2023.101062

A nano-sized precipitate strengthened medium entropy alloy with superior strength-ductility synergy and exceptional corrosion resistance

Zhimin Pan
, Hong Luo^*
, Hongxu Cheng
, Qiancheng Zhao
, Xuefei Wang
, Yu Fu
, Yicong Ma
, Xiaogang Li

^*Corresponding author for this work

University of Science and Technology Beijing
Key Laboratory of Precision Opto-Mechatronics Technology (Ministry of Education)

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

Herein, a novel alloy system, namely CoNiVSi_x MEAs, was proposed. The addition of Si remarkably promoted strength-ductility synergy, and favourably ameliorated the corrosion resistance of CoNiV MEAs. As for CoNiVSi_0.1 MEA, the grain refinement effect prevails in strengthening the MEAs. The improved work-hardening capability caused by the reduction of SFE and the formation of DSBs contributed to a highly sustained strain hardening of CoNiVSi_0.1 MEA, which expounded a simultaneous increase in the strength and ductility. Besides, electrochemical results and XPS analyses indicated that CoNiVSi_0.1 MEA had better corrosion resistance, and bivalent Si oxides perhaps dominated the film barrier effect from aggressive medium for CoNiVSi_0.1 MEA in view of the large atomic ratio of O²⁻/OH⁻ and Si/V. This work provides a new and significant approach towards designing corrosion-resistant materials with superior strength-ductility synergy.

Original language	English
Article number	101062
Journal	Materials Today Physics
Volume	33
DOIs	https://doi.org/10.1016/j.mtphys.2023.101062
State	Published - Apr 2023
Externally published	Yes

Keywords

Corrosion resistance
Ductility
Medium entropy alloy
Microstructure
Strength

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10.1016/j.mtphys.2023.101062

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@article{ab0d361ce8c54eff8f60d450acfe6cb7,

title = "A nano-sized precipitate strengthened medium entropy alloy with superior strength-ductility synergy and exceptional corrosion resistance",

abstract = "Herein, a novel alloy system, namely CoNiVSix MEAs, was proposed. The addition of Si remarkably promoted strength-ductility synergy, and favourably ameliorated the corrosion resistance of CoNiV MEAs. As for CoNiVSi0.1 MEA, the grain refinement effect prevails in strengthening the MEAs. The improved work-hardening capability caused by the reduction of SFE and the formation of DSBs contributed to a highly sustained strain hardening of CoNiVSi0.1 MEA, which expounded a simultaneous increase in the strength and ductility. Besides, electrochemical results and XPS analyses indicated that CoNiVSi0.1 MEA had better corrosion resistance, and bivalent Si oxides perhaps dominated the film barrier effect from aggressive medium for CoNiVSi0.1 MEA in view of the large atomic ratio of O2−/OH− and Si/V. This work provides a new and significant approach towards designing corrosion-resistant materials with superior strength-ductility synergy.",

keywords = "Corrosion resistance, Ductility, Medium entropy alloy, Microstructure, Strength",

author = "Zhimin Pan and Hong Luo and Hongxu Cheng and Qiancheng Zhao and Xuefei Wang and Yu Fu and Yicong Ma and Xiaogang Li",

note = "Publisher Copyright: {\textcopyright} 2023 Elsevier Ltd",

year = "2023",

month = apr,

doi = "10.1016/j.mtphys.2023.101062",

language = "英语",

volume = "33",

journal = "Materials Today Physics",

issn = "2542-5293",

publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - A nano-sized precipitate strengthened medium entropy alloy with superior strength-ductility synergy and exceptional corrosion resistance

AU - Pan, Zhimin

AU - Luo, Hong

AU - Cheng, Hongxu

AU - Zhao, Qiancheng

AU - Wang, Xuefei

AU - Fu, Yu

AU - Ma, Yicong

AU - Li, Xiaogang

PY - 2023/4

Y1 - 2023/4

N2 - Herein, a novel alloy system, namely CoNiVSix MEAs, was proposed. The addition of Si remarkably promoted strength-ductility synergy, and favourably ameliorated the corrosion resistance of CoNiV MEAs. As for CoNiVSi0.1 MEA, the grain refinement effect prevails in strengthening the MEAs. The improved work-hardening capability caused by the reduction of SFE and the formation of DSBs contributed to a highly sustained strain hardening of CoNiVSi0.1 MEA, which expounded a simultaneous increase in the strength and ductility. Besides, electrochemical results and XPS analyses indicated that CoNiVSi0.1 MEA had better corrosion resistance, and bivalent Si oxides perhaps dominated the film barrier effect from aggressive medium for CoNiVSi0.1 MEA in view of the large atomic ratio of O2−/OH− and Si/V. This work provides a new and significant approach towards designing corrosion-resistant materials with superior strength-ductility synergy.

AB - Herein, a novel alloy system, namely CoNiVSix MEAs, was proposed. The addition of Si remarkably promoted strength-ductility synergy, and favourably ameliorated the corrosion resistance of CoNiV MEAs. As for CoNiVSi0.1 MEA, the grain refinement effect prevails in strengthening the MEAs. The improved work-hardening capability caused by the reduction of SFE and the formation of DSBs contributed to a highly sustained strain hardening of CoNiVSi0.1 MEA, which expounded a simultaneous increase in the strength and ductility. Besides, electrochemical results and XPS analyses indicated that CoNiVSi0.1 MEA had better corrosion resistance, and bivalent Si oxides perhaps dominated the film barrier effect from aggressive medium for CoNiVSi0.1 MEA in view of the large atomic ratio of O2−/OH− and Si/V. This work provides a new and significant approach towards designing corrosion-resistant materials with superior strength-ductility synergy.

KW - Corrosion resistance

KW - Ductility

KW - Medium entropy alloy

KW - Microstructure

KW - Strength

UR - https://www.scopus.com/pages/publications/85151480421

U2 - 10.1016/j.mtphys.2023.101062

DO - 10.1016/j.mtphys.2023.101062

M3 - 文章

AN - SCOPUS:85151480421

SN - 2542-5293

VL - 33

JO - Materials Today Physics

JF - Materials Today Physics

M1 - 101062

ER -

A nano-sized precipitate strengthened medium entropy alloy with superior strength-ductility synergy and exceptional corrosion resistance

Abstract

Keywords

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