Restrictions of Physical Properties on Solidification Microstructures of Al-based Binary Alloys by Cellular Automaton
スポンサーリンク
概要
- 論文の詳細を見る
The solidification microstructure evolution and the Columnar to Equiaxed Transition (CET) during Al–Si and Al–Cu binary alloy solidification processes are analyzed by the help of Cellular Automaton-Finite Difference (CA-FD) model. The effects of the physical properties, except the effects of the nucleation parameters and the operation parameters, on the cooling curves, the dendrite growth, the solidification morphologies and the CET of the Al–Si and Al–Cu binary alloys are emphatically discussed. Results show that the solidification morphologies are internally influenced by the physical properties related to the dendrite tip growth kinetics. Besides the solute diffusivity in liquid DL and the growth restriction parameter Q=mC0(kS/L−1), the Gibbs–Thomson coefficient Γ shows a great effect on dendrite tip growth rate. Their effects on the dendrite tip kinetics are ordered as m(kS/L−1)>Γ>DL. The growth rate can be predicted efficiently by the present simplified expression based on GGAN model combining several physical parameters and the local undercooling, which clearly shows the physical meaning of the constant coefficients in the simplified expression based on KGT model. The equiaxed ratio related to the solidification morphologies can also be evaluated as a function of those physical properties.
- 社団法人 日本鉄鋼協会の論文
- 2010-12-15
著者
-
He Jicheng
Key Laboratory (northeasten University) Ministry Of Education
-
Nakajima Keiji
Div. Of Applied Process Metallurgy Dep. Of Materials Sci. And Engineering Royal Inst. Of Technol. (k
-
Nakajima Keiji
Corporate Research & Development Laboratories Sumitomo Metals Industries Ltd.
-
He Jicheng
Northeastern University Shenyang
-
Zhang Hongwei
Key Laboratory Of Electromagnetic Processing Of Materials Ministry Of Education Northeastern Univers
-
Lei Hong
Key Laboratory Of Electromagnetic Processing Of Materials Ministry Of Education Northeastern Univers
-
Nakajima Keiji
Division Of Applied Process Metallurgy Department Of Materials Science And Engineering Royal Institu
-
Lei Hong
Key Laboratory Of Electromagnetic Processing Of Materials Ministry Of Education Northeastern Univers
-
Zhang Hongwei
Key Lab. Of Electromagnetic Processing Of Materials Ministry Of Education Northeastern Univ.
関連論文
- Effect of Oxide Catalyst on Heterogeneous Nucleation in Fe-10mass%Ni Alloys
- Effect of a high magnetic field on the microstructure formation in a 42CrMo steel during solid phase transformations
- Some Aspects on Grain Refining Additions with Focus on Clogging during Casting
- A Continuum Model of Solidification and Inclusion Collision-growth in the Slab Continuous Casting Caster
- Electromagnetic Field Distribution in Two-section Slitless Mold for Soft-contact Electromagnetic Continuous Casting
- Size Distribution of Deoxidation Products with Ti, Pr and Ti/Pr in Fe-10mass%Ni Alloy
- Effects of Uniform and Gradient High Magnetic Fields on Gravity Segregation in Aluminum Alloys
- Influences of Flow Intensity, Cooling Rate and Nucleation Density at Ingot Surface on Deflective Growth of Dendrites for Al-based Alloy
- Prediction of Solidification Microstructure and Columnar-to-equiaxed Transition of Al-Si Alloy by Two-dimensional Cellular Automaton with "Decentred Square" Growth Algorithm
- Intensification of Bubble Disintegration and Dispersion by Mechanical Stirring in Gas Injection Refining
- Formation Conditions of Mg_2TiO_4 and MgAl_2O_4 in Ti-Mg-Al Complex Deoxidation of Molten Iron
- Methodological Progress for Computer Simulation of Solidification and Casting
- Numerical Simulation for Collision and Growth of Inclusions in Ladles Stirred with Different Porous Plug Configurations
- In-Situ Fabrication of Bi/BiMn-BiMn-Mn Graded Materials by High Magnetic Field Gradients
- Solidified Structure Control of Metallic Materials by Static High Magnetic Fields
- Prediction of Solidification Paths for Fe-C-Cr Alloys by a Multiphase Segregation Model Coupled to Thermodynamic Equilibrium Calculations
- Restrictions of Physical Properties on Solidification Microstructures of Al-based Binary Alloys by Cellular Automaton
- Analysis of an Automatic Steel-teeming Method Using Electromagnetic Induction Heating in Slide Gate System
- Equilibrium Relationship between the Oxide Compounds in MgO-Al_2O_3-Ti_2O_3 and Molten Iron at 1873K
- Mathematical Model for Nucleation, Ostwald Ripening and Growth of Inclusion in Molten Steel
- Degree of Undercooling and Contact Angle of Pure Iron at 1933K on Single-crystal Al_2O_3, MgO, and MgAl_2O_4 under Argon Atmosphere with Controlled Oxygen Partial Pressure
- Liquid-Solid Interface Free Energies for Metals from Free-volume Method and Interface Structural Model
- Preface to the Special Issue on "Cutting Edge of Computer Simulation of Solidification and Casting"
- Influence of Oxide Particles and Residual Elements on Microstructure and Toughness in the Heat-Affected Zone of Low-Carbon Steel Deoxidized with Ti and Zr
- Prediction of Carbide Precipitation Using Partial Equilibrium Approximation in Fe–C–V–W–Cr–Mo High Speed Steels
- Effect of Traveling Magnetic Field on Flow, Mixing, Decarburization and Inclusion Removal during RH Refining Process
- Some Aspects on Grain Refining Additions with Focus on Clogging during Casting