A novel Cu-doped high entropy alloy with excellent comprehensive performances for marine application

Yuan Yu, Nannan Xu, Shengyu Zhu, Zhuhui Qiao, Jianbin Zhang, Jun Yang, Weimin Liu

科研成果: 期刊稿件文章同行评审

116 引用 (Scopus)

摘要

High entropy alloy (HEA) has attracted great interests as one of the promising multifunctional materials in marine applications. However, Cu as an effective biocide tends to form segregation in HEA, which could deteriorate corrosion and induce brittle fracture. Herein, we report a strategy to tailor the existing form of Cu in HEA from undesired large-scale segregation to uniform distribution with dispersed nanoscale precipitation, while retaining the unique structure characteristics of HEA. Eliminating Cu segregation improves toughness and avoids serious corrosion in the grain boundary. Uniform distribution with dispersed nanoscale precipitation of Cu further enhances the antifouling and lubricating abilities of Cu-doped HEA. Tailored AlCoCrFeNiCu0.5 HEA in this work has excellent comprehensive properties combining good mechanical properties, outstanding antifouling abilities, superior resistance to corrosion and wear. Furthermore, the corresponded mechanisms are discussed in terms of Cu-segregation-eliminated, nanoscale-Cu-precipitate-forming and comprehensive properties.

源语言英语
页(从-至)48-59
页数12
期刊Journal of Materials Science and Technology
69
DOI
出版状态已出版 - 10 4月 2021
已对外发布

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