Effect of Nd on the microstructure and corrosion behavior of Mg-Gd-Nd-Zr alloys

被引：14
作者：
Bao, Jian [1 ]
Li, Quanan [1 ,2 ]
Chen, Xiaoya [1 ,2 ]
Zhang, Qian [1 ]
Chen, Ziyi [1 ]
机构：
[1] Henan Univ Sci & Technol, Sch Mat Sci & Engn, Luoyang 471023, Peoples R China
[2] Prov & Ministerial Coconstruct Collaborat Innovat, Luoyang 471023, Peoples R China
来源：
MATERIALS RESEARCH EXPRESS | 2021年 / 8卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Mg-Gd-Nd-Zr alloy; microstructure; corrosion behavior; corrosion mechanism; electrochemical test; MECHANICAL-PROPERTIES; MAGNESIUM ALLOYS; HEAT-TREATMENT; RARE-EARTH; UNEXPECTED FORMATION; GRAIN-SIZE; 2ND PHASES; CAST; AZ63; PRECIPITATION;
D O I：
10.1088/2053-1591/abf52f
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The corrosion behavior of Mg-12.5Gd-xNd-0.3Zr (x = 1, 2, 3 wt%) alloys were investigated by weight loss tests and electrochemical measurements in 3.5% NaCl solution. The results show that the increase of Nd content refine the grains gradually and promote the precipitates. Mg-12.5Gd-xNd-0.3Zr alloy is composed of alpha-Mg and Mg5Gd and Nd41Mg5 phase, and the semi-continuous phase is formed with addition of 3% Nd. The corrosion resistance of Mg-12.5Gd-xNd-0.3Zr alloys sharply increases with the increase of Nd element by weight loss tests and the tendency is proven by means of electrochemical measurements. The corrosion resistance is improved when Nd content increases from 1% to 3% owning to the diminishing grain size and the change of distribution for second phase. The second phase play a dual effect on corrosion which depend on its distribution.
引用
收藏
页数：14
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