The Effects of Phase-Field Parameters on Grain Growth Morphologies in the Solidification
The Effects of Phase-Field Parameters on Grain Growth Morphologies in the Solidification
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DOI：
10.2320/matertrans.44.367
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发表时间：
2003-03
影响因子：
1.2
通讯作者：
Zhao Dai-Ping;Jing Tao;Liu Baicheng
中科院分区：
文献类型：
--
作者：
Zhao Dai-Ping;Jing Tao;Liu Baicheng
相场模型被认为是直接模拟枝晶生长形态的最充分的确定性模型之一，然而，模型中恒定参数对晶粒形态的影响尚不清楚。本文定量研究了生长形貌与过冷度、温度场与相场耦合系数、各向异性系数等参数的关系。讨论了树突形态与海藻形态的形成和转变。此外，研究了生长尖端生长速度与各参数的关系，分析了生长尖端分支理论和侧分支理论。
Phase field models have been known as one of the most adequate deterministic models for directly simulating the dendrite growth morphology, nevertheless, it was not clear how the grain morphologies were influenced by the constant parameters in the models. In this paper, it was studied quantitatively that the connection between the growth morphologies and some parameters including undercooling, the coupling coefficient between the temperature field and the phase field, the anisotropic coefficient and so on. The formation and transformation between the dendrite morphology and seaweed morphology were discussed. Besides, the relations between the tip growth speed and the parameters were studied, the theory of the growth tip branching-off and the theory of side-branching were analyzed.