Simulation of dendritic growth of Al-4 wt.% Cu alloy from an undercooled melt

2015 ◽  
Vol 106 (10) ◽  
pp. 1053-1059 ◽  
Author(s):  
Xianfei Zhang ◽  
Xikun Li
Keyword(s):  
Dendritic Growth ◽  
Cu Alloy ◽  
Undercooled Melt

scholarly journals Simulation of Dendritic Growth in Solidification of Al-Cu Alloy by Applying the Modified Cellular Automaton Model with the Growth Calculation of Nucleus within a Cell

2008 ◽  
Vol 594 ◽  
pp. 22-28 ◽  
Author(s):  
Hsiun Chang Peng ◽  
Long Sun Chao
Keyword(s):  
Cellular Automaton ◽  
Directional Solidification ◽  
Growth Velocity ◽  
Dendritic Growth ◽  
Nucleation Site ◽  
Cellular Automaton Model ◽  
Cu Alloy ◽  
A Cell ◽  
Undercooled Melt ◽  
Dendritic Microstructures

Rather than designated directly as solid if the micromesh (or cell) larger than a nucleus is chosen as the nucleation site, the growth of a nucleus in the cell is considered in the application of the modified cellular automaton model to simulate the evolution of dendritic microstructures in the solidification of Al-Cu alloy. The growth velocity of a nucleus or a dendrite tip is calculated according to the KGT (Kurz-Giovanola-Trivedi) model, which is the function of the undercooling. In this study, the dendritic microstructures, such as the free dendritic growth in an undercooled melt and the dendritic growth in the directional solidification, are simulated with the modified growth algorithm in the nucleation cell. The simulated results for the temporal and final morphologies are shown and are in agreement with the experimental ones.

Solidifcation of undercooled melt of Mg-Cu alloy entrapped in its primary phase

1992 ◽  
Vol 11 (18) ◽  
pp. 1260-1262 ◽  
Author(s):  
O. P. Pandey ◽  
S. N. Ojha ◽  
T. R. Anantharaman
Keyword(s):  
Primary Phase ◽  
Cu Alloy ◽  
Undercooled Melt

Phase-Field Simulation of Three-Dimensional Dendritic Growth

2010 ◽  
Vol 97-101 ◽  
pp. 3769-3772 ◽  
Author(s):  
Chang Sheng Zhu ◽  
Jun Wei Wang
Keyword(s):  
Computational Methods ◽  
Phase Field ◽  
Interfacial Energy ◽  
Dendritic Growth ◽  
Field Model ◽  
Three Dimensional ◽  
Phase Field Model ◽  
Computational Time ◽  
Field Simulation ◽  
Undercooled Melt

Based on a thin interface limit 3D phase-field model by coupled the anisotropy of interfacial energy and self-designed AADCR to improve on the computational methods for solving phase-field, 3D dendritic growth in pure undercooled melt is implemented successfully. The simulation authentically recreated the 3D dendritic morphological fromation, and receives the dendritic growth rule being consistent with crystallization mechanism. An example indicates that AADCR can decreased 70% computational time compared with not using algorithms for a 3D domain of size 300×300×300 grids, at the same time, the accelerated algorithms’ computed precision is higher and the redundancy is small, therefore, the accelerated method is really an effective method.

scholarly journals Dendritic growth velocities in an undercooled melt of pure nickel under static magnetic fields: A test of theory with convection

2016 ◽  
Vol 103 ◽  
pp. 184-191 ◽  
Author(s):  
Jianrong Gao ◽  
Mengkun Han ◽  
Andrew Kao ◽  
Koulis Pericleous ◽  
Dmitri V. Alexandrov ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Dendritic Growth ◽  
Pure Nickel ◽  
Static Magnetic Fields ◽  
Undercooled Melt

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.

A Phase-Field Lattice-Boltzmann Study on Dendritic Growth of Al-Cu Alloy Under Convection

2018 ◽  
Vol 49 (6) ◽  
pp. 3603-3615 ◽  
Author(s):  
Ang Zhang ◽  
Jinglian Du ◽  
Zhipeng Guo ◽  
Qigui Wang ◽  
Shoumei Xiong
Keyword(s):  
Phase Field ◽  
Lattice Boltzmann ◽  
Dendritic Growth ◽  
Cu Alloy

scholarly journals NUMERICAL SIMULATION OF DENDRITIC GROWTH IN UNDERCOOLED MELT USING PHASE-FIELD APPROACH

2001 ◽  
Vol 50 (12) ◽  
pp. 2423
Author(s):  
YU YAN-MEI ◽  
YANG GEN-CANG ◽  
ZHAO DA-WEN ◽  
Lyu YI-LI ◽  
A. KARMA ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Phase Field ◽  
Dendritic Growth ◽  
Field Approach ◽  
Undercooled Melt

scholarly journals Interconnection between microstructure and microhardness of directionally solidified binary Al-6wt.%Cu and multicomponent Al-6wt.%Cu-8wt.%Si alloys

2016 ◽  
Vol 88 (2) ◽  
pp. 1099-1111 ◽  
Author(s):  
ANGELA J. VASCONCELOS ◽  
RAFAEL H. KIKUCHI ◽  
ANDRÉ S. BARROS ◽  
THIAGO A. COSTA ◽  
MARCELINO DIAS ◽  
...  
Keyword(s):  
Dendritic Growth ◽  
Energy Dispersive Spectrometry ◽  
Primary Dendrite ◽  
Heat Extraction ◽  
Directionally Solidified ◽  
Cu Alloy ◽  
Primary Dendrite Arm Spacing ◽  
Columnar To Equiaxed Transition ◽  
Equiaxed Grains ◽  
Comprehensive Characterization

An experimental study has been carried out to evaluate the microstructural and microhardness evolution on the directionally solidified binary Al-Cu and multicomponent Al-Cu-Si alloys and the influence of Si alloying. For this purpose specimens of Al-6wt.%Cu and Al-6wt.%Cu-8wt.%Si alloys were prepared and directionally solidified under transient conditions of heat extraction. A water-cooled horizontal directional solidification device was applied. A comprehensive characterization is performed including experimental dendrite tip growth rates (VL) and cooling rates (TR) by measuring Vickers microhardness (HV), optical microscopy and scanning electron microscopy with microanalysis performed by energy dispersive spectrometry (SEM-EDS). The results show, for both studied alloys, the increasing of TR and VL reduced the primary dendrite arm spacing (l1) increasing the microhardness. Furthermore, the incorporation of Si in Al-6wt.%Cu alloy to form the Al-6wt.%Cu-8wt.%Si alloy influenced significantly the microstructure and consequently the microhardness but did not affect the primary dendritic growth law. An analysis on the formation of the columnar to equiaxed transition (CET) is also performed and the results show that the occurrence of CET is not sharp, i.e., the CET in both cases occurs in a zone rather than in a parallel plane to the chill wall, where both columnar and equiaxed grains are be able to exist.

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