TY - JOUR
T1 - A novel Cu-doped high entropy alloy with excellent comprehensive performances for marine application
AU - Yu, Yuan
AU - Xu, Nannan
AU - Zhu, Shengyu
AU - Qiao, Zhuhui
AU - Zhang, Jianbin
AU - Yang, Jun
AU - Liu, Weimin
N1 - Publisher Copyright:
© 2020
PY - 2021/4/10
Y1 - 2021/4/10
N2 - 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.
AB - 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.
KW - Comprehensive properties
KW - Copper
KW - High entropy alloys
KW - Nanoscale precipitate
KW - Ocean
UR - http://www.scopus.com/inward/record.url?scp=85091940343&partnerID=8YFLogxK
U2 - 10.1016/j.jmst.2020.08.016
DO - 10.1016/j.jmst.2020.08.016
M3 - 文章
AN - SCOPUS:85091940343
SN - 1005-0302
VL - 69
SP - 48
EP - 59
JO - Journal of Materials Science and Technology
JF - Journal of Materials Science and Technology
ER -
