Effect of grain size and crystal orientation on the corrosion behavior of as-extruded Mg-6Gd-2Y-0.2Zr alloy

被引：108

作者：

Luo, Yaofeng ^{[1
]}

Deng, Yunlai ^{[1
,2
]}

Guan, Liqun ^{[1
]}

Ye, Lingying ^{[1
,2
]}

Guo, Xiaobin ^{[1
]}

Luo, An ^{[1
]}

机构：

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

[2] Cent South Univ, Key Lab Nonferrous Met Mat Sci & Engn, Minist Educ, Changsha 410083, Peoples R China

来源：

CORROSION SCIENCE | 2020年 / 164卷

关键词：

Magnesium; Rare earth elements; SEM; AZ31 MG ALLOY; CRYSTALLOGRAPHIC ORIENTATION; ELECTROCHEMICAL CORROSION; RESISTANCE; TEXTURE; MICROSTRUCTURE; EXTRUSION; CA; ND;

D O I：

10.1016/j.corsci.2019.108338

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influence of grain size and crystal orientation on the corrosion behavior of as-extruded Mg-6Gd-2Y-0.2Zr alloy is investigated by scanning electron microscopy (SEM), electron backscatter diffraction (EBSD). The EBSD system is used to characterize the grain size, crystal orientation and corroded surface. By investigating the corrosion process of as-extruded Mg-6Gd-2Y-0.2 Zr alloy, we can observe that the smaller grains and (10-10)/(11-20) non-basal planes are more susceptible to corrosion in the aggressive corrosion environment. Furthermore, the relationship between the corrosion rate and grain size is connected with the crystal orientation and whether the passivation occurs.

引用

页数：6

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