Natural ageing responses of duplex structured Mg-Li based alloys

IMR OpenIR

	Natural ageing responses of duplex structured Mg-Li based alloys
	Li, C. Q.; Xu, D. K.; Wang, B. J.; Sheng, L. Y.; Qiao, Y. X.; Han, E. H.; Xu, DK (reprint author), Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, 62 Wencui Rd, Shenyang 110016, Peoples R China.
	2017-01-05
发表期刊	SCIENTIFIC REPORTS
ISSN	2045-2322
卷号	7 页码:-
摘要	Natural ageing responses of duplex structured Mg-6% Li and Mg-6% Li-6% Zn-1.2% Y alloys have been investigated. Microstructural analyses revealed that the precipitation and coarsening process of alpha-Mg particles could occur in beta-Li phases of both two alloys during ageing process. Since a certain amount of Mg atoms in beta-Li phases were consumed for the precipitation of abundant tiny MgLiZn particles, the size of alpha-Mg precipitates in Mg-6% Li-6% Zn-1.2% Y alloy was relatively smaller than that in Mg-6% Li alloy. Micro hardness measurements demonstrated that with the ageing time increasing, the alpha-Mg phases in Mg-6% Li alloy could have a constant hardness value of 41 HV, but the contained beta-Li phases exhibited a slight age-softening response. Compared with the Mg-6% Li alloy, the age-softening response of beta-Li phases in Mg-6% Li-6% Zn-1.2% Y alloy was much more profound. Meanwhile, a normal age-hardening response of alpha-Mg phases was maintained. Tensile results indicated that obvious ageing-softening phenomenon in terms of macro tensile strength occurred in both two alloys. Failure analysis demonstrated that for the Mg-6% Li alloy, cracks were preferentially initiated at alpha-Mg/beta-Li interfaces. For the Mg-6% Li-6% Zn-1.2% Y alloy, cracks occurred at both alpha-Mg/beta-Li interfaces and slip bands in alpha-Mg and beta-Li phases.; Natural ageing responses of duplex structured Mg-6% Li and Mg-6% Li-6% Zn-1.2% Y alloys have been investigated. Microstructural analyses revealed that the precipitation and coarsening process of alpha-Mg particles could occur in beta-Li phases of both two alloys during ageing process. Since a certain amount of Mg atoms in beta-Li phases were consumed for the precipitation of abundant tiny MgLiZn particles, the size of alpha-Mg precipitates in Mg-6% Li-6% Zn-1.2% Y alloy was relatively smaller than that in Mg-6% Li alloy. Micro hardness measurements demonstrated that with the ageing time increasing, the alpha-Mg phases in Mg-6% Li alloy could have a constant hardness value of 41 HV, but the contained beta-Li phases exhibited a slight age-softening response. Compared with the Mg-6% Li alloy, the age-softening response of beta-Li phases in Mg-6% Li-6% Zn-1.2% Y alloy was much more profound. Meanwhile, a normal age-hardening response of alpha-Mg phases was maintained. Tensile results indicated that obvious ageing-softening phenomenon in terms of macro tensile strength occurred in both two alloys. Failure analysis demonstrated that for the Mg-6% Li alloy, cracks were preferentially initiated at alpha-Mg/beta-Li interfaces. For the Mg-6% Li-6% Zn-1.2% Y alloy, cracks occurred at both alpha-Mg/beta-Li interfaces and slip bands in alpha-Mg and beta-Li phases.
部门归属	[li, c. q. ; xu, d. k. ; wang, b. j. ; han, e. h.] chinese acad sci, inst met res, cas key lab nucl mat & safety assessment, 62 wencui rd, shenyang 110016, peoples r china ; [li, c. q.] northeastern univ, minist educ, key lab anisotropy & texture mat, shenyang 110819, peoples r china ; [sheng, l. y.] peking univ, shenzhen inst, shenzhen key lab human tissue regenerate & repair, shenzhen 518057, peoples r china ; [qiao, y. x.] jiangsu univ sci & technol, zhenjiang 212003, peoples r china
学科领域	Multidisciplinary Sciences
资助者	National Natural Science Foundation of China [51271183, 51301172]; National Basic Research Program of China (973 Program) [2013CB632205]; National Key Research and Development Program of China [2016YFB0301105]; Shenzhen Basic Research Project [JCYJ20150529162228734]; Innovation Fund of Institute of Metal Research (IMR), Chinese Academy of Sciences (CAS)
收录类别	SCI
语种	英语
WOS记录号	WOS:000391258200001
引用统计	被引频次：102[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/321006/78349
专题	中国科学院金属研究所
通讯作者	Xu, DK (reprint author), Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, 62 Wencui Rd, Shenyang 110016, Peoples R China.
推荐引用方式 GB/T 7714	Li, C. Q.,Xu, D. K.,Wang, B. J.,et al. Natural ageing responses of duplex structured Mg-Li based alloys[J]. SCIENTIFIC REPORTS,2017,7:-.
APA	Li, C. Q..,Xu, D. K..,Wang, B. J..,Sheng, L. Y..,Qiao, Y. X..,...&Xu, DK .(2017).Natural ageing responses of duplex structured Mg-Li based alloys.SCIENTIFIC REPORTS,7,-.
MLA	Li, C. Q.,et al."Natural ageing responses of duplex structured Mg-Li based alloys".SCIENTIFIC REPORTS 7(2017):-.