L21-strengthened face-centered cubic high-entropy alloy with well pitting resistance

被引：34
作者：
Wei, Liang [1 ,2 ,3 ]
Qin, Wei -Min [1 ,2 ]
Chen, Jing-Yao [1 ,2 ]
Lei, Wen-Xin [4 ]
Xi, Jin-Yang [4 ,5 ]
机构：
[1] Shanghai Univ, State Key Lab Adv Special Steels, Sch Mat Sci & Engn, Shanghai 200444, Peoples R China
[2] Shanghai Univ, Sch Mat Sci & Engn, Shanghai Key Lab Adv Ferrometallurgy, Shanghai 200444, Peoples R China
[3] Max Planck Inst Eisenforschung, Max Planck Str 1, D-40237 Dusseldorf, Germany
[4] Shanghai Univ, Mat Genome Inst, Shanghai 200444, Peoples R China
[5] Zhejiang Lab, Hangzhou 311100, Zhejiang, Peoples R China
来源：
CORROSION SCIENCE | 2023年 / 215卷
基金：
中国国家自然科学基金;
关键词：
High -entropy alloy; Pitting resistance; Passive film; Micro -galvanic corrosion; SKPFM; DUPLEX STAINLESS-STEEL; PASSIVE FILM; CORROSION PROPERTIES; MECHANICAL-PROPERTIES; CREEP RESISTANCE; PIT INITIATION; WORK-FUNCTIONS; MICROSTRUCTURE; TI; BEHAVIOR;
D O I：
10.1016/j.corsci.2023.111043
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Effect of phase structure and composition on the passive film properties and pitting behavior of L21-strengthened (CoCrFeNi)86Al7Ti7 high-entropy alloy (HEA) in 3.5 wt.% NaCl was investigated. Results shown that the bilayer amorphous passive film enriched in Cr-, Fe-oxides/hydroxides on (Fe, Cr)-rich FCC phase and that enriched in Ti, Ni-oxides on (Ni, Al, Ti)-rich L21 phase both contributed to the well pitting resistance. There was a microgalvanic corrosion effect between FCC phase (cathode) and L21 phase (anode), which in synergy with Clbroken the passive film on L21 phase at two-phase interface and resulted in pitting nucleation.
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页数：13
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