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Formation of long-period stacking-ordered (LPSO) structures and microhardness of as-cast Mg-4.5Zn-6Y alloy
Mao, Pingli1,2; Xin, Yan1; Han, Ke1; Liu, Zheng2; Yang, Zhiqing3
Corresponding AuthorMao, Pingli(pinglimao@yahoo.com) ; Han, Ke(han@magnet.fsu.edu)
2020-03-10
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume777Pages:8
AbstractLong-period stacking-ordered (LPSO) structures formed in both the a-Mg component and the interdendritic component in as-cast Mg-4.5Zn-6Y-0.5Zr (wt.%) alloy were studied from micro to atomic scales. Inside the alpha-Mg component, stacking-ordered structure took three forms: single unit, scattered cluster, and a single layer of short range 18R structures. Chemical ordering of clusters of Zn and Y formed in the short range scale but not in the long range. Inside the interdendritic component LPSO-layered structure took two forms: 18R and 14H LPSO. Long-range 18R formed at locations with high concentrations of Zn and Y. 14H LPSO phase formed at the edge of any layer of 18R LPSO phase, sandwiched between 18R and alpha-Mg band. We concluded that the formation of LPSO had occurred in two distinct steps. First, Zn and Y atoms were segregated into two adjacent atomic layers of the original hexagonal close-packed matrix. Then, the nucleation of stacking fault occurred, followed by the growth of a stacking fault, which attracted more Zn and Y atoms into four constitutive close-packed layers, forming a new segment of an LPSO structural unit.
KeywordMagnesium alloy Long-period stacking-ordered structure Formation and growth mechanism Transmission electron microscopy (TEM)
Funding OrganizationNational Science Foundation ; State of Florida ; High Level Innovation Team of Liaoning Province
DOI10.1016/j.msea.2020.139019
Indexed BySCI
Language英语
Funding ProjectNational Science Foundation[DMR-1157490] ; National Science Foundation[DMR-1644779] ; State of Florida ; High Level Innovation Team of Liaoning Province[XlYC1908006]
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000521512000020
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/138139
Collection中国科学院金属研究所
Corresponding AuthorMao, Pingli; Han, Ke
Affiliation1.Florida State Univ, Natl High Magnet Field Lab, 1800 E Paul Dirac Dr, Tallahassee, FL 32310 USA
2.Shenyang Univ Technol, Sch Mat Sci & Engn, Shenyang 110870, Peoples R China
3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Mao, Pingli,Xin, Yan,Han, Ke,et al. Formation of long-period stacking-ordered (LPSO) structures and microhardness of as-cast Mg-4.5Zn-6Y alloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2020,777:8.
APA Mao, Pingli,Xin, Yan,Han, Ke,Liu, Zheng,&Yang, Zhiqing.(2020).Formation of long-period stacking-ordered (LPSO) structures and microhardness of as-cast Mg-4.5Zn-6Y alloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,777,8.
MLA Mao, Pingli,et al."Formation of long-period stacking-ordered (LPSO) structures and microhardness of as-cast Mg-4.5Zn-6Y alloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 777(2020):8.
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