Microstructural evolution during partial remelting of AM60B magnesium alloy refined by MgCO3

doi:10.1016/S1003-6326(09)60348-4

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	Microstructural evolution during partial remelting of AM60B magnesium alloy refined by MgCO3
	Chen Ti-jun; Ma Ying; Wang Rui-quan; Li Yuan-dong; Hao Yuan
	2010-09
发表期刊	TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
ISSN	1003-6326
卷号	20 期号:9 页码:1615-1621
摘要	AM60B magnesium alloy was refined by MgCO3 and its microstructural evolution was investigated during partial remelting. The results indicate that MgCO3 is an effective grain refiner for AM60B alloy and can decrease the grain size from 329 mu m of the unrefined alloy to 69 mu m. A semisolid microstructure with small and spheroidal primary particles can be obtained after being partially remelted. The microstructure evolution can be divided into four steps: the initial rapid coarsening, structure separation, spheroidization and final coarsening. Correspondingly, these four steps result from the phase transformations of beta ->alpha, alpha+beta -> L and alpha -> L, alpha -> L and two reverse reactions of alpha -> L and L ->alpha, respectively. One spheroidal primary particle in the semisolid microstructure usually originates one dendrite in the as-cast microstructure. The variation of primary particle size with holding time does not obey the LSW law, D-t(3)-D-0(3)=Kt, after the semisolid system is in its solid-liquid equilibrium state. Longer heating duration makes the primary particles more globular, but it makes their size larger at the same time.
关键词	AM60B alloy thixoforming microstructure evolution phase transformation partial remelting
DOI	10.1016/S1003-6326(09)60348-4
收录类别	SCI ; SCIE
语种	英语
资助项目	National Basic Research Program of China[G2007CB613706]
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000282373800011
出版者	ELSEVIER SCIENCE BV
EI入藏号	20104013274375
EI主题词	Magnesium alloys
EI分类号	482.2 Minerals - 534.1 Foundries - 542.2 Magnesium and Alloys - 801.4 Physical Chemistry - 951 Materials Science
引用统计	被引频次：10[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/35207
专题	发展规划处材料科学与工程学院
通讯作者	Chen Ti-jun
作者单位	Lanzhou Univ Technol, Key Lab Gansu Adv Nonferrous Met Mat, Lanzhou 730050, Peoples R China
第一作者单位	材料科学与工程学院
通讯作者单位	材料科学与工程学院
第一作者的第一单位	材料科学与工程学院
推荐引用方式 GB/T 7714	Chen Ti-jun,Ma Ying,Wang Rui-quan,et al. Microstructural evolution during partial remelting of AM60B magnesium alloy refined by MgCO3[J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,2010,20(9):1615-1621.
APA	Chen Ti-jun,Ma Ying,Wang Rui-quan,Li Yuan-dong,&Hao Yuan.(2010).Microstructural evolution during partial remelting of AM60B magnesium alloy refined by MgCO3.TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,20(9),1615-1621.
MLA	Chen Ti-jun,et al."Microstructural evolution during partial remelting of AM60B magnesium alloy refined by MgCO3".TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 20.9(2010):1615-1621.

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