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

被引：116
作者：
Yu, Yuan [1 ,2 ,3 ]
Xu, Nannan [4 ]
Zhu, Shengyu [1 ,2 ]
Qiao, Zhuhui [1 ,2 ,3 ]
Zhang, Jianbin [1 ]
Yang, Jun [1 ,2 ]
Liu, Weimin [1 ,2 ]
机构：
[1] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China
[2] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China
[3] Qingdao Ctr Resource Chem & New Mat, Qingdao 266000, Peoples R China
[4] Qingdao Univ, Sch Publ Hlth, Qingdao 266000, Peoples R China
来源：
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2021年 / 69卷
基金：
中国国家自然科学基金; 国家重点研发计划;
关键词：
High entropy alloys; Copper; Nanoscale precipitate; Comprehensive properties; Ocean; MECHANICAL-PROPERTIES; TRIBOLOGICAL PROPERTIES; CORROSION BEHAVIORS; STAINLESS-STEEL; MICROSTRUCTURE; EVOLUTION; WEAR; DUCTILITY; COATINGS; FILM;
D O I：
10.1016/j.jmst.2020.08.016
中图分类号：
T [工业技术];
学科分类号：
08 ;
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. (C) 2021 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
引用
收藏
页码：48 / 59
页数：12
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