Effect of Anisotropy Coefficient and Gibbs-Thomson Coefficient on Dendrite Growth

张俊婷; 崔小朝; 王宥宏

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Effect of Anisotropy Coefficient and Gibbs-Thomson Coefficient on Dendrite Growth

更新时间：2026-09-14

- Effect of Anisotropy Coefficient and Gibbs-Thomson Coefficient on Dendrite Growth
- CA法模拟各向异性和Gibbs-Thomson参数对枝晶生长的影响
- Vol. 34, Issue 2, Pages: 204-207(2013)
- 作者机构：
  
  太原科技大学应用科学学院
- 作者简介：
- 基金信息：
- DOI：
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- Published：2013
- 稿件说明：
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张俊婷, 崔小朝, 王宥宏. Effect of Anisotropy Coefficient and Gibbs-Thomson Coefficient on Dendrite Growth[J]. 2013, 34(2): 204-207.
DOI：

张俊婷, 崔小朝, 王宥宏. Effect of Anisotropy Coefficient and Gibbs-Thomson Coefficient on Dendrite Growth[J]. 2013, 34(2): 204-207. DOI：

摘要

基于溶质扩散和界面能的作用

考虑成分过冷、曲率过冷、界面能各向异性和界面扰动等因素

建立了单个枝晶的生长模型.应用该模型将有限体积法与元胞自动机相结合

对Al-4%wtCu合金的枝晶生长过程进行了计算机模拟研究.结果发现:界面能各向异性和Gibbs-Thomson参数对枝晶的形貌和生长速度有着重要影响

随着Gibbs-Thomson系数和各向异性强度的减小

枝晶臂沿优先生长方向出现分裂

且生长速度也随之减小.

Abstract

Based on the physical effect of solute diffusion and interfacial energy

a model for describing the growth of single equiaxed dendrite was established

including the factors of constitutional undercooling

curvature undercooling

anisotropy of interfacial energy and perturbation on the interface.Using this modeling approach combining the finite volume method and the cellular automata technique

the solidification of Al-4%wtCu alloys was simulated.The results show that the impact of anisotropy coefficient and Gibbs-Thomson coefficient for the morphologies of dendrite and the velocity of dendrite growth is important.With the decreasing of anisotropy intensity and Gibbs-Thomson coefficient

the growth velocity of the dendritic tip would be reduced

and the well known branching of finger would been observed.

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references

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