Microstructure and corrosion behavior of as-extruded Mg-xLi-3Al-2Zn-0.2Zr alloys (x=5, 8, 11 wt.%)

被引：80

作者：

Sun, Yuehua ^{[1
]}

Wang, Richu ^{[1
]}

Peng, Chaoqun ^{[1
]}

Cai, Zhiyong ^{[1
]}

机构：

[1] Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China

来源：

CORROSION SCIENCE | 2020年 / 167卷

关键词：

Magnesium; EIS; XPS; Intergranular corrosion; Pitting corrosion; MECHANICAL-PROPERTIES; INTERGRANULAR CORROSION; DEFORMATION-BEHAVIOR; MAGNESIUM ALLOY; MG ALLOY; CHLORIDE; RECRYSTALLIZATION; COMPRESSION; DISSOLUTION; RESISTANCE;

D O I：

10.1016/j.corsci.2020.108487

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The microstructure and corrosion behavior of as-extruded Mg-xLi-3Al-2Zn-0.2Zr alloys (x = 5, 8, 11 wt.%) were investigated. Intergranular corrosion is observed in alpha-Mg phase, while pitting corrosion takes place in beta-Li phase. In dual-phase LAZ832-0.2Zr alloy, micro-galvanic corrosion occurs at the alpha-Mg/beta-Li phase interface. As-extruded LAZ832-0.2Zr alloy exhibits the best corrosion resistance due to that a-Mg phase contains fewer twins, finer and sparser AlLi phase at grain boundaries, and narrower Al depleted zones compared with as-extruded LAZ532-0.2Zr alloy, and beta-Li phase exhibits smaller grain size, lower dislocation density, and fewer AlLi particles compared with as-extruded LAZ1132-0.2Zr alloy.

引用

页数：15

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