Microstructure evolution of Al-Si semi-solid slurry by gas bubble stirring method

被引：0

作者：

张磊 ^{[1
]}

董选普 ^{[1
]}

李继强 ^{[2
]}

李侃 ^{[1
]}

张宗奎 ^{[1
]}

王文俊 ^{[1
]}

樊自田 ^{[1
]}

机构：

[1] State Key Laboratory of Material Forming and Mould and Die Designing, Huazhong University of Science and Technology

[2] School of Mechanical and Energy, Ningbo Institute of Technology, Zhejiang University

来源：

Journal of Central South University of Technology | 2011年 / 18卷 / 06期

关键词：

gas bubble stirring; semi-solid slurry; solidification rate; microstructure;

D O I：

暂无

中图分类号：

TG146.21 [];

学科分类号：

080502 ;

摘要：

A novel technique of introducing gas bubble stirring during solidification was studied to prepare Al-Si semi-solid slurry. The microstructure evolution of the slurry during slow cooling process after stirring was investigated. The effects of the solidification rate on the microstructure of the semi-solid slurry were investigated under three different solidification conditions. The results show that fine non-dendritic slurry can be obtained using the gas bubble stirring method. Ripening and coarsening of primary Al grains are observed during the slow cooling process, and at last coarsened eutectic Si appears. Primary Al grains with different sizes and eutectic Si are obtained, corresponding to three different solidification rates.

引用

页码：1789 / 1794

页数：6

共 11 条

[1]

Annulus electromagnetic stirring for preparing semisolid A357 aluminum alloy slurry[J]. 白月龙,徐骏,张志峰,石力开.Transactions of Nonferrous Metals Society of China. 2009(05)

[2]

Effect of pouring temperature on semi-solid slurry of A356 Al alloy prepared by weak electromagnetic stirring[J]. 刘政,毛卫民,赵振铎.Transactions of Nonferrous Metals Society of China. 2006(01)

[3] An investigation on DC casting of a wrought aluminium alloy at below liquidus temperature by using melt conditioner [J].

Haghayeghi, R. ;

Zoqui, E. J. ;

Green, N. R. ;

Bahai, H. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2010, 502 (02) :382-386

[4] Grain refinement of an aluminum alloy by introducing gas bubbles during solidification [J].

Wannasin, J. ;

Martinez, R. A. ;

Flemings, M. C. .

SCRIPTA MATERIALIA, 2006, 55 (02) :115-118

[5]

Effect of pouring temperature on semi-solid slurry of A356 Al alloy prepared by weak electromagnetic stirring[J] . Zheng LIU,Wei-min MAO,Zheng-duo ZHAO.Transactions of Nonferrous Metals Society of China . 2006 (1)

[6]

Solidification microstructure affecting ductility in semi-solid-cast products[J] . J.L. Jorstad,Q.Y. Pan,D. Apelian.Materials Science ＆ Engineering A . 2005

[7] Mechanical properties and microstructural evaluation of AA5013 aluminum alloy treated in the semi-solid state by SIMA process [J].

Saklakoglu, N ;

Saklakoglu, IE ;

Tanoglu, M ;

Oztas, O ;

Cubukcuoglu, O .

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 2004, 148 (01) :103-107

[8] Structural evolution of conventional cast dendritic and spray-cast non-dendritic structures during isothermal holding in the semi-solid state [J].

Wang, JL ;

Su, YH ;

Tsao, CYA .

SCRIPTA MATERIALIA, 1997, 37 (12) :2003-2007

[9]

The effect of electromagnetic stirring during solidification on the structure of Al-Si alloys[J] . W.D. Griffiths,D.G. McCartney.Materials Science ＆ Engineering A . 1996 (1)

[10] ELABORATION OF SEMISOLID ALLOYS BY MEANS OF NEW ELECTROMAGNETIC RHEOCASTING PROCESSES [J].

VIVES, C .

METALLURGICAL TRANSACTIONS B-PROCESS METALLURGY, 1992, 23 (02) :189-206

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