Role of the LPSO structure in the improvement of corrosion resistance of Mg-Gd-Zn-Zr alloys

doi:10.1016/j.jallcom.2018.12.233

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	Role of the LPSO structure in the improvement of corrosion resistance of Mg-Gd-Zn-Zr alloys
	Liu, Jing 2; Yang, Lixin 3; Zhang, Chunyan 1; Zhang, Bo 3; Zhang, Tao 1; Li, Yang 1; Wu, Kaiming 2; Wang, Fuhui 1
刊名	JOURNAL OF ALLOYS AND COMPOUNDS
	2019-04-25
卷号	782 页码:648-658
关键词	Mg-Gd-Zn-Zr alloys LPSO structure Corrosion behavior SKPFM
ISSN号	0925-8388
DOI	10.1016/j.jallcom.2018.12.233
通讯作者	Zhang, Chunyan(bozhang@imr.ac.cn) ; Zhang, Tao(zhangtao@mail.neu.edu.cn)
英文摘要	The role of long period stacking ordered (LPSO) structure in the corrosion behavior of Mg-Gd-Zn-Zr alloys was investigated by means of potentiodynamic polarization experiments, hydrogen evolution tests, and microstructure characterization. The corrosion rate of the Mg-Gd-Zn-Zr alloys is mainly determined by the acceleration effect of the second phases in the micro-galvanic corrosion. After T4 heat-treatment, the beta-(Mg,Zn)(3)Gd eutectic phase in the as-cast Mg-Gd-Zn-Zr alloys transforms into an X phase with a 14-HLPSO structure. According to the results of scanning Kelvin probe force microscopy (SKPFM), the potential difference between LPSO phase and the alpha-Mg matrix is 243 mV, whereas, it is 290 mV between the eutectic phase and matrix in the as-cast alloys. The low relative potential and volume fraction of the LPSO phase reduce the acceleration degree of micro-galvanic corrosion. As a result, the corrosion resistance of Mg-Gd-Zn-Zr alloys improves significantly by the LPSO structure. (C) 2018 Elsevier B.V. All rights reserved.
资助项目	National Natural Science Foundation of China[51531007] ; National Natural Science Foundation of China[51771050] ; National program for the Young Top-notch Professionals ; Fundamental Research Funds for the Central Universities[N170205002]
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000458608600072
资助机构	National Natural Science Foundation of China ; National program for the Young Top-notch Professionals ; Fundamental Research Funds for the Central Universities
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/131957]
专题	金属研究所_中国科学院金属研究所
通讯作者	Zhang, Chunyan; Zhang, Tao
作者单位	1.Northeastern Univ, Shenyang Natl Lab Mat Sci, 3-11 Wenhua Rd, Shenyang 110819, Liaoning, Peoples R China 2.Wuhan Univ Sci & Technol, Int Res Inst Steel Technol, Hubei Prov Key Lab Syst Sci Met Proc, State Key Lab Refractories & Met, 947 Heping Ave, Wuhan 430081, Hubei, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Liu, Jing,Yang, Lixin,Zhang, Chunyan,et al. Role of the LPSO structure in the improvement of corrosion resistance of Mg-Gd-Zn-Zr alloys[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2019,782:648-658.
APA	Liu, Jing.,Yang, Lixin.,Zhang, Chunyan.,Zhang, Bo.,Zhang, Tao.,...&Wang, Fuhui.(2019).Role of the LPSO structure in the improvement of corrosion resistance of Mg-Gd-Zn-Zr alloys.JOURNAL OF ALLOYS AND COMPOUNDS,782,648-658.
MLA	Liu, Jing,et al."Role of the LPSO structure in the improvement of corrosion resistance of Mg-Gd-Zn-Zr alloys".JOURNAL OF ALLOYS AND COMPOUNDS 782(2019):648-658.