Effect of molybdenum content on the microstructure and corrosion behavior of FeCoCrNiMox high-entropy alloys

被引：223

作者：

Dai, Chunduo ^{[1
,2
]}

Zhao, Tianliang ^{[4
]}

Du, Cuiwei ^{[1
,2
,3
]}

Liu, Zhiyong ^{[1
,2
]}

Zhang, Dawei ^{[1
,2
]}

机构：

[1] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Beijing 100083, Peoples R China

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

[3] Univ Sci & Technol Beijing, Beijing Adv Innovat Ctr Mat Genome Engn, Beijing 100083, Peoples R China

[4] Shanghai Univ, Mat Genome Inst, Shanghai 200444, Peoples R China

来源：

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2020年 / 46卷

关键词：

High-entropy alloys; Corrosion behavior; Precipitate; DUPLEX STAINLESS-STEEL; FATIGUE CRACK INITIATION; PITTING CORROSION; PASSIVE FILMS; MECHANICAL-PROPERTIES; ELECTROCHEMICAL-BEHAVIOR; FERRITIC-STAINLESS; BIPOLAR MODEL; CYCLIC STRESS; E690; STEEL;

D O I：

10.1016/j.jmst.2019.10.020

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of Mo content on the microstructure revolution and corrosion behavior of cast FeCoCrNiMox high-entropy alloys in chloride environments were investigated. Results indicate that FeCoCrNi and FeCoCrNiMo0.1 alloys are in single FCC solid solution. The precipitates form in FeCoCrNiMo0.3 and increase in FeCoCrNiMo0.6 alloys. Pitting occurs on FeCoCrNi and FeCoCrNiMo0.1 alloys while FeCoCrNiMo0.3 and FeCoCrNiMo0.6 alloys suffer from preferential localized corrosion at the regions depleted in Cr and Mo. The higher Cr2O3/Cr(OH)(3) ratio and the incorporation of Mo oxides make the passive film more protective and the corrosion resistance of the FeCoCrNiMo0.1 alloy is thus enhanced. The correlation between microstructure and corrosion behavior and the corresponding corrosion mechanism were clarified. (C) 2020 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.

引用

页码：64 / 73

页数：10

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