Gadolinium solubility and precipitate identification in Mg-Gd binary alloy

被引：25

作者：

Peng Qiuming ^{[1
]}

Ma Ning ^{[1
]}

Li Hui ^{[1
]}

机构：

[1] Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China

来源：

JOURNAL OF RARE EARTHS | 2012年 / 30卷 / 10期

关键词：

Mg alloys; microstructure; precipitate; annealing; rare earths; CORROSION;

D O I：

10.1016/S1002-0721(12)60179-3

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Gadolinium (Gd) solubility in magnesium (Mg) matrix and precipitate composition in Mg-Gd binary alloys were investigated. The alloys containing different Gd contents (10 wt.%-35 wt.%) were employed to identify Gd solubility after annealing at different temperatures. It was confirmed that the maximum Gd solubility was 22.8 wt.% at 550 degrees C based on the regression analysis method. Mg5+xGd (0<x<2) and Mg3Gd precipitates coexisted in all investigated alloys owing to the strong component segregation during solidification. The fraction of Mg5+xGd (0<x<2) was decreased with the increment of annealing temperature and time. In contrast, Mg3Gd precipitate could not be eliminated even when being annealed at 550 degrees C. This thermal stable precipitate played a significant role in mechanical properties. Therefore, it is very necessary to consider the effect of Mg3Gd precipitate on properties of Mg-Gd based alloys in future.

引用

页码：1064 / 1068

页数：5

共 14 条

[1]

[Anonymous], 2003, Magnesium alloys containing rare earth metals: structure and properties

[2] Microstructure and mechanical properties of the accumulative roll bonded (ARBed) pure magnesium sheet [J].

Chang, H. ;

Zheng, M. Y. ;

Wu, K. ;

Gan, W. M. ;

Tong, L. B. ;

Brokmeier, H. -G. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2010, 527 (27-28) :7176-7183

[3] Investigation of the corrosion for Mg-xGd-3Y-0.4Zr (x=6,8,10,12 wt%) alloys in a peak-aged condition [J].

Chang, Jianwei ;

Guo, Xingwu ;

He, Shangming ;

Fu, Penghuai ;

Peng, Liming ;

Ding, Wenjiang .

CORROSION SCIENCE, 2008, 50 (01) :166-177

[4] Thermal properties of Mg-11Y-5Gd-2Zn-0.5Zr (wt.%) alloy [J].

Chen, C. J. ;

Wang, Q. D. ;

Yin, D. D. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2009, 487 (1-2) :560-563

[5]

Emley E.F., 1966, PRINCIPLES MAGNESIUM

[6] Effect of Zr, Mn and Sc additions on the grain size of Mg-Gd alloy [J].

Fang, X. Y. ;

Yi, D. Q. ;

Nie, J. F. ;

Zhang, X. J. ;

Wang, B. ;

Xiao, L. R. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2009, 470 (1-2) :311-316

[7] Interference of magnesium corrosion with tetrazolium-based cytotoxicity assays [J].

Fischer, Janine ;

Prosenc, Marc H. ;

Wolff, Martin ;

Hort, Norbert ;

Willumeit, Regine ;

Feyerabend, Frank .

ACTA BIOMATERIALIA, 2010, 6 (05) :1813-1823

[8] Mg-Gd-Y system phase diagram calculation and experimental clarification [J].

Guo Yongchun ;

Li Hanping ;

Li Jinshan ;

Yang Zhong ;

Zhao Juan ;

Xia Feng ;

Liang Minxian .

JOURNAL OF ALLOYS AND COMPOUNDS, 2008, 450 (1-2) :446-451

[9] Microstructures and properties of Mg-7Gd alloy containing Y [J].

Peng, Q. M. ;

Wu, Y. M. ;

Fang, D. Q. ;

Meng, J. ;

Wang, L. M. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2007, 430 (1-2) :252-256

[10] Strain induced GdH2 precipitate in Mg-Gd based alloys [J].

Peng, Qiuming ;

Huang, Yuanding ;

Meng, Jian ;

Li, Yangde ;

Kainer, Karl Ulrich .

INTERMETALLICS, 2011, 19 (03) :382-389

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