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
N1 - Publisher Copyright:
© 2023 Elsevier Ltd
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 -