Effect of a high magnetic field on solidification structure in directionally solidified NiAl-Cr(Mo)-Hf eutectic alloy

2018 ◽  
Vol 737 ◽  
pp. 74-82 ◽  
Author(s):  
Huan Liu ◽  
Weidong Xuan ◽  
Xinliang Xie ◽  
Jianbo Yu ◽  
Jiang Wang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
High Magnetic Field ◽  
Eutectic Alloy ◽  
Solidification Structure ◽  
Directionally Solidified

Effect of a High Magnetic Field on the Microstructure of Directionally Solidified NiAl-Cr(Mo)-Si Near-Eutectic Alloy at Different Withdrawal Rates

2017 ◽  
Vol 898 ◽  
pp. 407-412 ◽  
Author(s):  
Huan Liu ◽  
Wei Dong Xuan ◽  
Xing Fu Ren ◽  
Bao Jun Wang ◽  
Jian Bo Yu ◽  
...  
Keyword(s):  
Magnetic Field ◽  
High Magnetic Field ◽  
Eutectic Alloy ◽  
Magnetic Force ◽  
Volume Fraction ◽  
Withdrawal Rate ◽  
Directionally Solidified ◽  
Combined Action ◽  
Columnar To Equiaxed Transition ◽  
The Magnetic Field

The effect of a 6T high magnetic field on the microstructure of directionally solidified NiAl-Cr (Mo)-Si near-eutectic alloy was investigated at the withdrawal rates of 2, 10 and 50 μm/s. The results showed that the microstructure evolved from planar eutectic to primary NiAl dendrites + cellular eutectic and then to dendritic eutectic with the increasing withdrawal rate. When the magnetic field was imposed, the well-aligned eutectic lamellae were disturbed and transformed into a wavy one at 2 μm/s. When the withdrawal rate increased to 10 μm/s, the application of the magnetic field destroyed the primary NiAl dendrite array and caused the occurrence of columnar-to-equiaxed transition (CET) of the NiAl dendrites. The volume fraction of primary dendrites also decreased. In addition, the width of intercellular/interdendritic regions decreased in cellular/dendritic eutectic structures when directionally solidified under the magnetic field. The above results should be attributed to the combined action of the thermoelectric magnetic force and the thermoelectric magnetic convection.

Effect of a high magnetic field on the microstructure in directionally solidified two-phase Ni3Al alloys

2017 ◽  
Vol 189 ◽  
pp. 131-135 ◽  
Author(s):  
Huan Liu ◽  
Weidong Xuan ◽  
Xinliang Xie ◽  
Jianbo Yu ◽  
Jiang Wang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
High Magnetic Field ◽  
Directionally Solidified ◽  
Two Phase

The Lamellar Eutectic Spacing Changes under the High Magnetic Field during the Diffusion of Liquid Al/Solid Cu Process

2010 ◽  
Vol 160-162 ◽  
pp. 603-607
Author(s):  
Bo Xu ◽  
Wei Ping Tong ◽  
Tian You Kang ◽  
Liang Zuo ◽  
Ji Cheng He
Keyword(s):  
Magnetic Field ◽  
Diffusion Process ◽  
High Magnetic Field ◽  
Field Intensity ◽  
Eutectic Alloy ◽  
Magnetic Field Intensity ◽  
High Magnetic Fields ◽  
Lamellar Eutectic ◽  
Eutectic Spacing ◽  
The Magnetic Field

The effect of a high magnetic field (up to 12T) on the lamellar eutectic spacing changes was investigated in the diffusion liquid Al/solid Cu. It was found that the lamellar eutectic alloy is formed in the diffusion process and its spacing has the non-monotonic relationship with the magnetic field intensity. With the increase of magnetic field intensity, the lamellar eutectic spacing decreases rapidly. When the magnetic field intensity B exceeds 4T, the lamellar eutectic spacing begins to increase until 8T, and then, decrease again. This phenomenon could be attributed to the effects of high magnetic fields suppressing nature convection and inducing thermo-electromagnetic convection in the liquid Al.

Effect of a transverse magnetic field on solidification structure in directionally solidified Al–40 wt% Cu alloys

2016 ◽  
Vol 31 (2) ◽  
pp. 213-221 ◽  
Author(s):  
Hanxiao Li ◽  
Dafan Du ◽  
Annie Gagnoud ◽  
Yves Fautrelle ◽  
Rene Moreau ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Transverse Magnetic Field ◽  
Transverse Magnetic ◽  
Solidification Structure ◽  
Directionally Solidified ◽  
Cu Alloys ◽  
Image Position

Abstract

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