The grain size control of A356 aluminum alloy by horizontal electromagnetic stirring for rheology forging

2007 ◽  
Vol 187-188 ◽  
pp. 344-348 ◽  
Author(s):  
C.G. Kang ◽  
J.W. Bae ◽  
B.M. Kim
Keyword(s):  
Grain Size ◽  
Aluminum Alloy ◽  
Size Control ◽  
Electromagnetic Stirring ◽  
A356 Aluminum Alloy ◽  
Grain Size Control ◽  
A356 Aluminum

The Research on the Annulus Electromagnetic Stirring for Preparing the Semisolid A356 Aluminum Alloy Slurry

2014 ◽  
Vol 217-218 ◽  
pp. 241-246
Author(s):  
Yue Long Bai ◽  
Jun Xu ◽  
Zhi Feng Zhang
Keyword(s):  
Aluminum Alloy ◽  
Electromagnetic Stirring ◽  
A356 Aluminum Alloy ◽  
Primary Particles ◽  
A356 Aluminum ◽  
Semi Solid ◽  
Gap Width

The effects of annulus gap width, stirring power and stirring frequency on the microstructure of the semi-solid A356 aluminum alloy slurry have been investigated by the annulus electromagnetic stirring (AEMS) technology The results show that narrow annulus gap , strong stirring power and high stirring frequency are advantageous to obtain the small spherical primarymicrostructure, the smaller the annulus gap width is, the bigger the stirring power is, and the higher the stirring frequency is, the more uniform, the smaller and the more spherical the microstructure is. So the high stirring frequency, narrow annulus gap, strong stirring power are beneficial to obtain the fine and spherical semisolid microstructure in AEMS. Also the results indicate that the primary particles are globular, small and distribute homogeneously in the AEMS.

Effect of Vertical Electromagnetic Stirring on the Grain Refinement of A356 Aluminum Alloy Inoculated by Al-5Ti-B

2006 ◽  
Vol 116-117 ◽  
pp. 344-349 ◽  
Author(s):  
Zhao Yang ◽  
J.W. Bae ◽  
C.G. Kang
Keyword(s):  
Grain Size ◽  
Grain Refinement ◽  
A356 Alloy ◽  
Electromagnetic Stirring ◽  
A356 Aluminum Alloy ◽  
X Ray ◽  
Stirring Time ◽  
A356 Aluminum ◽  
Tib2 Particles ◽  
Aluminum Phase

In this paper, the influence of electromagnetic stirring on the grain size of A356 alloy inoculated by Al-5Ti-B was investigated. It is found that when stirring is applied at the same time with Al-5Ti-B, the inoculation effect will be disabled. X-ray determination and SEM observation show that stirring hinders the deposition of TiB2 particles; consequently hinder the formation of TiAl3 particles, which were proved to be the nucleus of primary α aluminum phase. If the stirring time is short, the grain size will be abnormally coarse. This experiment also confirms that the grain refinement of rheocasting is caused by dendrite fracture instead of modified nucleation.

Grain size control in Al–Si alloys by grain refinement and electromagnetic stirring

2009 ◽  
Vol 487 (1-2) ◽  
pp. 163-172 ◽  
Author(s):  
V. Metan ◽  
K. Eigenfeld ◽  
D. Räbiger ◽  
M. Leonhardt ◽  
S. Eckert
Keyword(s):  
Grain Size ◽  
Grain Refinement ◽  
Size Control ◽  
Electromagnetic Stirring ◽  
Grain Size Control

Investigation of the Relationships between Billet Reheating and Semi-Solid Die-Casting

2010 ◽  
Vol 97-101 ◽  
pp. 306-310 ◽  
Author(s):  
Xiang Lin Yin ◽  
Yi Tao Yang ◽  
Yu Peng Shao ◽  
Guang Jie Shao
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Aluminum Alloy ◽  
Die Casting ◽  
Surface Hardness ◽  
A356 Aluminum Alloy ◽  
Final Temperature ◽  
A356 Aluminum ◽  
Semi Solid ◽  
The Relationship

The non-dendritic of A356 aluminum alloy billet was reheated to meet the requirements of the semi-solid microstructure by three different kinds of power, achieving the same final temperature of 863K. Subsequently, under the same conditions of die-casting (thixoforming), the microstructure was observed, surface hardness and tensile properties were measured. Afterwards, quantitative analysis was made for the microstructure of the reheated semi-solid of billet and the thixoforming parts. The results showed that the larger induction reheating power of the billet, the smaller the grain size of its microstructure and the higher surface hardness and the better mechanical properties of its thixoforming sample. Finally, through studying on the relationship between the microstructure of the semi-solid billet of A356 aluminum alloy and the mechanical properties of the thixoforming sample, we primarily achieved the reverse design of microstructure.

Fabrication of Rheological Material of A356 Aluminum Alloy by Electromagnetic Stirring through Vacuum Pump

2008 ◽  
Vol 141-143 ◽  
pp. 731-736
Author(s):  
H.H. Kim ◽  
S.M. Lee ◽  
C.G. Kang
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Atmospheric Pressure ◽  
Vacuum Pump ◽  
Electromagnetic Stirring ◽  
Vacuum Pressure ◽  
A356 Aluminum Alloy ◽  
Forging Process ◽  
A356 Aluminum

This study demonstrates fabricating rheological material by EMS system attached vacuum pump, in order to improve mechanical properties of rheoforged products by removing defects such as porosity and oxides arising from rheological forging process. The billet fabricated by EMS in vacuum pressure reduced formation of oxides and porosities of the inner material. The billet fabricated by EMS in vacuum pressure below 56 cm/Hg remarkably reduced porosities, comparing to the EMS in atmospheric pressure.

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