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

作　　者：Chunduo Dai Tianliang Zhao Cuiwei Du Zhiyong Liu Dawei Zhang 

机构地区：[1]Institute for Advanced Materials and Technology,University of Science and Technology Beijing,Beijing 100083,China [2]Key Laboratory for Corrosion and Protection of The Ministry of Education(MOE),Beijing 100083,China [3]Beijing Advanced Innovation Center for Materials Genome Engineering,University of Science and Technology Beijing,Beijing 100083,China [4]Materials Genome Institute of Shanghai University,Shanghai 200444,China

出　　处：《Journal of Materials Science & Technology》2020年第11期64-73,共10页材料科学技术（英文版）

基　　金：the National Material Environmental Corrosion infrastructure;the State Key Laboratory for Advanced Metals and Materials(No.2018Z-05)。

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.

关 键 词：High-entropy alloys Corrosion behavior PRECIPITATE 

分 类 号：TG178[金属学及工艺—金属表面处理]