Grain refinement of AZ91D magnesium alloy by MgCO3

doi:10.1590/S1516-14392011005000017

	Grain refinement of AZ91D magnesium alloy by MgCO3
	Chen, Ti Jun; Jiang, Xiang Dong; Ma, Ying; Wang, Rui Quan; Hao, Yuan
刊名	Materials Research
	2011-03-01
卷号	14 期号:1 页码:124-133
关键词	Aluminum compounds Grain refinement Grain size and shape Magnesite Microstructure Nucleation Refining AZ91D magnesium alloys Cooling rates Grain refining Heterogeneous nucleation Large diameter Molten alloy Pouring temperatures Refining mechanisms
ISSN号	15161439
DOI	10.1590/S1516-14392011005000017
英文摘要	The grain refining technique of AZ91D magnesium alloy by MgCO3 has been investigated. The refining mechanism and tensile properties of the resulting alloy have also been discussed. The results indicate that MgCO 3 can decrease its grain size from 311 to 53μm. Correspondingly, the tensile properties are obviously improved. The higher the cooling rate from addition temperature to pouring temperature or the higher the addition temperature, the finer the grains. The melt treated by MgCO3 should be poured as soon as possible because the inoculation fading is quite quick. The microstructure sensitivity to the diameter of a cast rod is relatively high and the microstructures of the rods with large diameters are quite inhomogeneous. The refining mechanism of MgCO3 belongs to heterogeneous nucleation and the nucleant substrates are believed to be the Al4C3 particles formed from the reactions between the MgCO3 and the molten alloy. © 2011.
WOS研究方向	Materials Science
语种	英语
出版者	Universidade Federal de Sao Carlos
WOS记录号	WOS:000289856400021
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/110967]
专题	材料科学与工程学院
作者单位	Key Laboratory of Gansu Advanced Nonferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, China
推荐引用方式 GB/T 7714	Chen, Ti Jun,Jiang, Xiang Dong,Ma, Ying,et al. Grain refinement of AZ91D magnesium alloy by MgCO3[J]. Materials Research,2011,14(1):124-133.
APA	Chen, Ti Jun,Jiang, Xiang Dong,Ma, Ying,Wang, Rui Quan,&Hao, Yuan.(2011).Grain refinement of AZ91D magnesium alloy by MgCO3.Materials Research,14(1),124-133.
MLA	Chen, Ti Jun,et al."Grain refinement of AZ91D magnesium alloy by MgCO3".Materials Research 14.1(2011):124-133.