Phase-Field Micro-Solidification Simulation for Dendrite Growth in Ni-Cu Binary Alloy

2013 ◽  
Vol 830 ◽  
pp. 3-7
Author(s):  
Wei Zhou Hou ◽  
Hong Kui Mao
Keyword(s):  
Phase Field ◽  
Growth Parameters ◽  
Field Method ◽  
Isothermal Solidification ◽  
Dendrite Growth ◽  
Phase Field Method ◽  
Solidification Condition ◽  
Solidification Simulation ◽  
Cu Alloy ◽  
Undercooled Melt

By optimizing the relevant dendrite growth parameters of Ni-Cu alloy undercooling melt, it has studied the effect that the dendrite evolution process of undercooled melt and the degree of undercooling melt have on the dendrite growth of undercooling melt. In the isothermal and non-isothermal solidification condition, relatively accurate result is obtained by applying the phase field method to simulate Ni-Cu alloy. Simulation results show non-isothermal simulation with Neuman boundary condition suit to the actual physical process better.

Phase field method simulation of faceted dendrite growth with arbitrary symmetries

2018 ◽  
Vol 28 (2) ◽  
pp. 290-297 ◽  
Author(s):  
Zhi CHEN ◽  
Pei CHEN ◽  
He-he GONG ◽  
Pei-pei DUAN ◽  
Li-mei HAO ◽  
...  
Keyword(s):  
Phase Field ◽  
Field Method ◽  
Dendrite Growth ◽  
Phase Field Method ◽  
Faceted Dendrite

Impact on Solidification Dendrite Growth by Interfacial Atomic Motion Time with Phase Field Method

2013 ◽  
Vol 749 ◽  
pp. 660-667
Author(s):  
Yu Hong Zhao ◽  
Wei Jin Liu ◽  
Hua Hou ◽  
Yu Hui Zhao
Keyword(s):  
Phase Field ◽  
Field Model ◽  
Phase Field Model ◽  
Field Method ◽  
Dendrite Growth ◽  
Atomic Motion ◽  
Phase Field Method ◽  
Dendrite Morphology ◽  
Motion Time ◽  
Solidification Processes

The Phase Field model of solidification processes was carried out coupled with temperature field model. The influence of interface atomic time on dendrite growth morphology in undercooled melt was simulated with pure nickel. The experimental results show that when the interface atomic motion time parameter is minor, the liquid-solid interfaces were unstable, disturbance can be amplified easily so the complicated side branches will grow, and the disturbance speed up the dendrite growth. With the increase of , the liquid-solid interfaces become more stable and finally the smooth dendrite morphology can be obtained.

Numerical Simulation of Dendrite Growth and Micro Segregation of Ni-Cu Alloy

2019 ◽  
Vol 944 ◽  
pp. 155-162
Author(s):  
Ming Guang Wang ◽  
Shan Jiang
Keyword(s):  
Microscopic Theory ◽  
Field Method ◽  
Solute Segregation ◽  
Dendrite Growth ◽  
Lateral Branch ◽  
Phase Field Method ◽  
Saturation Degree ◽  
Cu Alloy ◽  
The Impact ◽  
Good Agreement

Dendrite growth of Ni-0.4083%Cu alloy was simulated by the phase-field method in the paper. The impact of super-cooling degree and super-saturation degree and solute segregation on dendrite growth was studied systematically. solute segregation increased initially then tended to decrease. The increase of super-saturation can promote the growth of lateral branch and destroy the constancy of the dendrite tip at the same time. The simulation result was compared with the microscopic theory and they have a good agreement.

Numerical Simulation of Dendrite Growth of Binary Alloy Using Phase-Field Method

2014 ◽  
Vol 716-717 ◽  
pp. 133-136
Author(s):  
Fang Hui Liu ◽  
Ming Gao
Keyword(s):  
Temperature Gradient ◽  
Binary Alloy ◽  
Phase Field ◽  
Field Model ◽  
Phase Field Model ◽  
Field Method ◽  
Dendrite Growth ◽  
Phase Field Method ◽  
Dendrite Morphology ◽  
Anisotropic Strength

In order to study the growth process and morphology of dendrite directly, a phase field model of binary alloy was established. In this model the order parameter equation was coupled with the temperature field and the solute field. The growing processes and morphology of dendrite were simulated by using this phase field model. Through analyzing the results, we discussed the effects of anisotropic strength and temperature gradient on dendrite morphology. The results shows that with the increasing of anisotropic strength, the dendrite growth rate of the dendrite will increase and the secondary branches appear more clearly. Besides, the temperature gradient has influence on the appearance of secondary arms during the dendrite growing. With the increase of temperature gradient, the size of secondary dendrite arms increase.

scholarly journals 105 Solidification Simulation of Copper-Iron Alloy for Lead Frame by Phase-field Method

2012 ◽  
Vol 2012.20 (0) ◽  
pp. 9-10
Author(s):  
Takaaki HARA ◽  
Yoshiharu KANEGAE ◽  
Yuichi HIRAMOTO ◽  
Tatsuya TONOGI
Keyword(s):  
Phase Field ◽  
Iron Alloy ◽  
Field Method ◽  
Phase Field Method ◽  
Lead Frame ◽  
Solidification Simulation

Numerical Simulation of Binary Alloy Crystal Growth of Multiple Dendrites and Direcitonal Solidification Using Phase-Field Method

2013 ◽  
Vol 774-776 ◽  
pp. 703-706
Author(s):  
Ming Chen ◽  
Yu Jiang ◽  
Wen Long Sun ◽  
Xiao Dong Hu ◽  
Chun Li Liu
Keyword(s):  
Directional Solidification ◽  
Binary Alloy ◽  
Phase Field ◽  
Phase Field Model ◽  
Solidification Process ◽  
Solute Concentration ◽  
Field Method ◽  
Dendrite Growth ◽  
Phase Field Method ◽  
Competitive Growth

Phase field method (PFM) offers the prospect of carrying out realistic numerical calculation on dendrite growth in metallic systems. The dendritic growth process of multiple dendrites and direcitonal solidification during isothermal solidifications in a Fe-0.5mole%C binary alloy were simulated using phase field model. Competitive growth of multiple equiaxed dendrites were simulated, and the effect of anisotropy on the solute segregation and microstructural dedritic growth pattern in directional solidification process was studied in the paper. The simulation results showed the impingement of arbitrarily oriented grains, and the grains began to impinge and coalesce the adjacent grains with time going on, which made the dendrite growth inhibited obviously. In the directional solidification, the maximum concentration gradient showed in the dendrite tip, and highest solute concentration existed at the bottom of the dendrites. With the increasing of the anisotropy, dendrite tip radius became smaller, and the crystal structure is more uniform and dense.

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