稀土学报（英文版）
稀土學報（英文版）
희토학보（영문판）
JOURNAL OF RARE EARTHS
2014年
6期
558-563
,共6页
杨淼%刘耀辉%刘家安%宋雨来
楊淼%劉耀輝%劉傢安%宋雨來
양묘%류요휘%류가안%송우래
magnesium alloy%rare earth element Gd%corrosion%corrosion residual strength%rare earths
In order to improve the corrosion and mechanical properties of AM50 magnesium alloy, 1 wt.% Gd was used to modify the AM50 magnesium alloy. The microstructure, corrosion and mechanical properties were evaluated by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), electrochemical and mechanical stretch methods. The results indicated that β-Mg17Al12 phase decreased and Al2Gd3 and Al0.4GdMn1.6 phase existed after Gd addition. Because of the Gd addition, the grain of AM50 magnesium alloy was refined significantly, which improved the tensile strength of AM50 magnesium al-loy. The decreasing ofβ phase improved the corrosion resistance of the magnesium alloy. The fracture mechanism of the Gd modified AM50 magnesium alloy was quasi-cleavage fracture. The corrosion residual strength (CRS) of AM50 magnesium alloy was im-proved after 1 wt.% Gd addition.
