Formation of long-period stacking-ordered (LPSO) structures and microhardness of as-cast Mg-4.5Zn-6Y alloy

doi:10.1016/j.msea.2020.139019

IMR OpenIR

	Formation of long-period stacking-ordered (LPSO) structures and microhardness of as-cast Mg-4.5Zn-6Y alloy
	Mao, Pingli 1,2; Xin, Yan 1; Han, Ke 1; Liu, Zheng 2; Yang, Zhiqing 3
通讯作者	Mao, Pingli(pinglimao@yahoo.com) ; Han, Ke(han@magnet.fsu.edu)
	2020-03-10
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	777 页码:8
摘要	Long-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.
关键词	Magnesium alloy Long-period stacking-ordered structure Formation and growth mechanism Transmission electron microscopy (TEM)
资助者	National Science Foundation ; State of Florida ; High Level Innovation Team of Liaoning Province
DOI	10.1016/j.msea.2020.139019
收录类别	SCI
语种	英语
资助项目	National Science Foundation[DMR-1157490] ; National Science Foundation[DMR-1644779] ; State of Florida ; High Level Innovation Team of Liaoning Province[XlYC1908006]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000521512000020
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：44[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/138139
专题	中国科学院金属研究所
通讯作者	Mao, Pingli; Han, Ke
作者单位	1.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
推荐引用方式 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.