Understanding the impacts of L12 nanoprecipitates on the electrochemical and passive behavior of CoCrNiAlTi-type high-entropy alloys

J. Y. Zhang; T. H. Chou; J. X. Zhang; J. H. Luan; Y. L. Zhao; T. Yang

doi:10.1016/j.corsci.2024.112211

Understanding the impacts of L1₂ nanoprecipitates on the electrochemical and passive behavior of CoCrNiAlTi-type high-entropy alloys

J. Y. Zhang
, T. H. Chou
, J. X. Zhang
, J. H. Luan
, Y. L. Zhao^*
, T. Yang^*

^*Corresponding author for this work

City University of Hong Kong
Harbin Institute of Technology
City University of Hong Kong Shenzhen Research Institute

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

29 Scopus citations

Abstract

This work investigated the effects of L1₂ nanoprecipitates on the electrochemical corrosion behavior and passive film characteristics of CoCrNiAlTi-type high-entropy alloys (HEAs) in chloride-containing solutions. Compared with the single-phase recrystallized alloys, the precipitation of the L1₂ phase destabilized surface passive films, thus deteriorating the localized corrosion resistance and increasing the metastable pitting activities of the L1₂-strengthened HEA. Influenced by the L1₂-induced chemical inhomogeneities, the increase of Cr(OH)₃ content in passive films together with the high galvanic corrosion tendency between the two phases was considered as the main reason for the increased susceptibility of the L1₂-strengthened alloys to localized corrosion attacks.

Original language	English
Article number	112211
Journal	Corrosion Science
Volume	235
DOIs	https://doi.org/10.1016/j.corsci.2024.112211
State	Published - 15 Jul 2024
Externally published	Yes

Keywords

Electrochemical polarization
High-entropy alloys
Mechanical properties
Nanoscale precipitation
Passive film

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10.1016/j.corsci.2024.112211

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title = "Understanding the impacts of L12 nanoprecipitates on the electrochemical and passive behavior of CoCrNiAlTi-type high-entropy alloys",

abstract = "This work investigated the effects of L12 nanoprecipitates on the electrochemical corrosion behavior and passive film characteristics of CoCrNiAlTi-type high-entropy alloys (HEAs) in chloride-containing solutions. Compared with the single-phase recrystallized alloys, the precipitation of the L12 phase destabilized surface passive films, thus deteriorating the localized corrosion resistance and increasing the metastable pitting activities of the L12-strengthened HEA. Influenced by the L12-induced chemical inhomogeneities, the increase of Cr(OH)3 content in passive films together with the high galvanic corrosion tendency between the two phases was considered as the main reason for the increased susceptibility of the L12-strengthened alloys to localized corrosion attacks.",

keywords = "Electrochemical polarization, High-entropy alloys, Mechanical properties, Nanoscale precipitation, Passive film",

author = "Zhang, \{J. Y.\} and Chou, \{T. H.\} and Zhang, \{J. X.\} and Luan, \{J. H.\} and Zhao, \{Y. L.\} and T. Yang",

note = "Publisher Copyright: {\textcopyright} 2024 Elsevier Ltd",

year = "2024",

month = jul,

day = "15",

doi = "10.1016/j.corsci.2024.112211",

language = "英语",

volume = "235",

journal = "Corrosion Science",

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publisher = "Elsevier Ltd",

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TY - JOUR

T1 - Understanding the impacts of L12 nanoprecipitates on the electrochemical and passive behavior of CoCrNiAlTi-type high-entropy alloys

AU - Zhang, J. Y.

AU - Chou, T. H.

AU - Zhang, J. X.

AU - Luan, J. H.

AU - Zhao, Y. L.

AU - Yang, T.

PY - 2024/7/15

Y1 - 2024/7/15

N2 - This work investigated the effects of L12 nanoprecipitates on the electrochemical corrosion behavior and passive film characteristics of CoCrNiAlTi-type high-entropy alloys (HEAs) in chloride-containing solutions. Compared with the single-phase recrystallized alloys, the precipitation of the L12 phase destabilized surface passive films, thus deteriorating the localized corrosion resistance and increasing the metastable pitting activities of the L12-strengthened HEA. Influenced by the L12-induced chemical inhomogeneities, the increase of Cr(OH)3 content in passive films together with the high galvanic corrosion tendency between the two phases was considered as the main reason for the increased susceptibility of the L12-strengthened alloys to localized corrosion attacks.

AB - This work investigated the effects of L12 nanoprecipitates on the electrochemical corrosion behavior and passive film characteristics of CoCrNiAlTi-type high-entropy alloys (HEAs) in chloride-containing solutions. Compared with the single-phase recrystallized alloys, the precipitation of the L12 phase destabilized surface passive films, thus deteriorating the localized corrosion resistance and increasing the metastable pitting activities of the L12-strengthened HEA. Influenced by the L12-induced chemical inhomogeneities, the increase of Cr(OH)3 content in passive films together with the high galvanic corrosion tendency between the two phases was considered as the main reason for the increased susceptibility of the L12-strengthened alloys to localized corrosion attacks.

KW - Electrochemical polarization

KW - High-entropy alloys

KW - Mechanical properties

KW - Nanoscale precipitation

KW - Passive film

UR - https://www.scopus.com/pages/publications/85195849627

U2 - 10.1016/j.corsci.2024.112211

DO - 10.1016/j.corsci.2024.112211

M3 - 文章

AN - SCOPUS:85195849627

SN - 0010-938X

VL - 235

JO - Corrosion Science

JF - Corrosion Science

M1 - 112211

ER -

Understanding the impacts of L1₂ nanoprecipitates on the electrochemical and passive behavior of CoCrNiAlTi-type high-entropy alloys

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Keywords

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