A nano-sized precipitate strengthened medium entropy alloy with superior strength-ductility synergy and exceptional corrosion resistance

被引：11

作者：

Pan, Zhimin ^{[1
,2
]}

Luo, Hong ^{[1
,2
,3
]}

Cheng, Hongxu ^{[1
,2
]}

Zhao, Qiancheng ^{[1
,2
]}

Wang, Xuefei ^{[1
,2
]}

Fu, Yu ^{[1
,2
]}

Ma, Yicong ^{[1
,2
]}

Li, Xiaogang ^{[1
,2
,3
]}

机构：

[1] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Natl Mat Corros & Protect Data Ctr, Beijing 100083, Peoples R China

[2] Minist Educ MOE, Key Lab Corros & Protect, Beijing 100083, Peoples R China

[3] Univ Sci & Technol Beijing, Shunde Grad Sch, BRI Southeast Asia Network Corros & Protect MOE, Foshan 528000, Peoples R China

来源：

MATERIALS TODAY PHYSICS | 2023年 / 33卷

基金：

中国国家自然科学基金;

关键词：

Medium entropy alloy; Strength; Ductility; Corrosion resistance; Microstructure; MECHANICAL-PROPERTIES; TENSILE PROPERTIES; MICROSTRUCTURE; STEEL; TEMPERATURE; PARAMETERS; STRESS; DESIGN; STRAIN;

D O I：

10.1016/j.mtphys.2023.101062

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页数：8

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