Significantly improved corrosion resistance of Mg-15Gd-2Zn-0.39Zr alloys: Effect of heat-treatment

被引:10
作者
Jing Liu [1 ]
Lixin Yang [2 ]
Chunyan Zhang [2 ]
Bo Zhang [2 ]
Tao Zhang [3 ]
Yang Li [3 ]
Kaiming Wu [1 ]
Fuhui Wang [3 ]
机构
[1] The State Key Laboratory of Refractories and Metallurgy,Hubei Province Key Laboratory of Systems Science in Metallurgical Process,International Research Institute for Steel Technology,Wuhan University of Science and Technology
[2] Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences
[3] Shenyang National Laboratory for Materials Science,Northeastern University
关键词
Mg-Gd-Zn-Zr alloy; Corrosion behavior; Heat-treatment; LPSO phase; SKPFM;
D O I
暂无
中图分类号
TG156 [热处理工艺]; TG146.22 [];
学科分类号
080201 ; 080503 ; 080502 ;
摘要
The effects of heat-treatment on corrosion behavior of Mg-15Gd-2Zn-0.39Zr alloys were investigated through microstructure characterization, corrosion tests, and scanning Kelvin probe force microscope(SKPFM) analysis. In long-term corrosion experiments, the corrosion rates of Mg-Gd-Zn-Zr alloys were mainly determined by the effects of micro-galvanic corrosion. During heat-treatment, the β-(Mg,Zn)3Gd eutectic phase in as-cast alloys transformed into a long-period stacking ordered(LPSO) phase, coupled with the precipitation of small precipitates. As heat-treatment proceeded, the local potential and the volume fraction of the LPSO phases reduced gradually compared with the eutectic phase, which resulted in a remarkable decrease of the micro-galvanic effect between the second phase and Mg matrix. As a result, the corrosion resistance of heat-treated alloys improved significantly.
引用
收藏
页码:1644 / 1654
页数:11
相关论文
共 3 条
[1]  
J.F.Wang,K.Wang,F.Hou,S.J.Liu,X.Peng,J.X.Wang,F.S.Pan. Mater.Sci.Eng.A . 2018
[2]  
R.Zhen,Y.S.Sun,F.Xue,J.J.Sun,J.Bai. J.Alloys.Compd . 2013
[3]  
Y.W.Song,D.Y.Shan,E.H.Han. J.Mater.Sci.Technol . 2017