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Role of the LPSO structure in the improvement of corrosion resistance of Mg-Gd-Zn-Zr alloys
Liu, Jing1; Yang, Lixin2; Zhang, Chunyan3; Zhang, Bo2; Zhang, Tao3; Li, Yang3; Wu, Kaiming1; Wang, Fuhui3
Corresponding AuthorZhang, Chunyan(bozhang@imr.ac.cn) ; Zhang, Tao(zhangtao@mail.neu.edu.cn)
2019-04-25
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume782Pages:648-658
AbstractThe 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.
KeywordMg-Gd-Zn-Zr alloys LPSO structure Corrosion behavior SKPFM
Funding OrganizationNational Natural Science Foundation of China ; National program for the Young Top-notch Professionals ; Fundamental Research Funds for the Central Universities
DOI10.1016/j.jallcom.2018.12.233
Indexed BySCI
Language英语
Funding ProjectNational 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 Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000458608600072
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:25[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/131958
Collection中国科学院金属研究所
Corresponding AuthorZhang, Chunyan; Zhang, Tao
Affiliation1.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
2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China
3.Northeastern Univ, Shenyang Natl Lab Mat Sci, 3-11 Wenhua Rd, Shenyang 110819, Liaoning, Peoples R China
Recommended Citation
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.
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