Secondary Solidification Behavior of A356 Aluminum Alloy Prepared by the Self-Inoculation Method

doi:10.3390/met7070233

	Secondary Solidification Behavior of A356 Aluminum Alloy Prepared by the Self-Inoculation Method
	Li, Ming 2; Li, Yuandong 1,2; Huang, Xiaofeng 1,2; Ma, Ying 1,2; Guan, Renguo 2,3
刊名	METALS
	2017-07-01
卷号	7 期号:7
关键词	A356 aluminum alloy semisolid self-inoculation method secondary solidification behavior eutectic structure
DOI	10.3390/met7070233
英文摘要	Semisolid slurry of A356 aluminum alloy was prepared by Self-Inoculation Method, and the secondary solidification behavior during rheo-diecasting forming process was researched. The results indicate that the component with non-dendritic and uniformly distributed microstructures can be produced by Rheo-Diecasting (RDC) process (combining Self-inoculation Method (SIM) with High Pressure Die Casting (HPDC)). The isothermal holding time of the slurry has large effect on primary particles, but has little effect on secondary particles. Growth rate of the primary particles in the isothermal holding process conforms to the dynamic equation of Dt(3) - D-0(3) = Kt. The suitable holding time for rheo-diecasting of A356 aluminum alloy is 3 min. During filling process, the nucleation occurs throughout the entire remaining liquid, and nuclei grow stably into globular particles with the limited grain size of 6.5 mu m firstly, then both alpha(1) and alpha(2) particles appear unstable growth phenomenon due to the existence of constitutional undercooling. The average particle sizes and shape factors of both alpha(1) and alpha(2) are decreasing with the increase of filling distance due to different cooling rate in different positions. The growth rate of the eutectic in RDC is 4 times faster than HPDC, which is mainly due to the limitation of alpha(2) particles in RDC process. The average eutectic spacings are decreasing with the increase of filling distance.
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	MDPI
WOS记录号	WOS:000407365900004
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/155428]
专题	材料科学与工程学院
作者单位	1.Lanzhou Univ Technol, Minist Educ, Key Lab Nonferrous Met Alloys & Proc, Lanzhou 730050, Gansu, Peoples R China; 2.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China; 3.Northeastern Univ, Minist Educ, Key Lab Electromagnet Proc Mat, Shenyang 110819, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Li, Ming,Li, Yuandong,Huang, Xiaofeng,et al. Secondary Solidification Behavior of A356 Aluminum Alloy Prepared by the Self-Inoculation Method[J]. METALS,2017,7(7).
APA	Li, Ming,Li, Yuandong,Huang, Xiaofeng,Ma, Ying,&Guan, Renguo.(2017).Secondary Solidification Behavior of A356 Aluminum Alloy Prepared by the Self-Inoculation Method.METALS,7(7).
MLA	Li, Ming,et al."Secondary Solidification Behavior of A356 Aluminum Alloy Prepared by the Self-Inoculation Method".METALS 7.7(2017).