A coupled Cellular Automaton-Lattice Boltzmann model for grain structure simulation during additive manufacturing
A coupled Cellular Automaton-Lattice Boltzmann model for grain structure simulation during additive manufacturing
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DOI：
10.1016/j.commatsci.2016.07.005
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发表时间：
2016-11-01
影响因子：
3.3
通讯作者：
Koerner, Carolin
中科院分区：
文献类型：
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作者：
Rai, Abha;Markl, Matthias;Koerner, Carolin
建立了二维元胞自动机-格子玻尔兹曼耦合模型，用于模拟粉末床逐层增材制造过程中的晶粒结构演化。所提出的模型包括随机粉末层生成，电子束能量吸收，蒸发，毛细作用和润湿，熔池动力学，其温度演变和面心立方晶粒凝固的算法。该模型首先验证了对单轨道电子束熔化和凝固的基板的实验结果，然后应用于模拟AM过程中产生的晶粒结构。孵化策略对晶粒结构的影响，以及部分熔融粉末颗粒造成的杂散晶粒的形成。(C)2016爱思唯尔B. V.保留所有权利。
A 2D coupled Cellular Automaton (CA)-Lattice Boltzmann (LB) model has been developed to simulate grain structure evolution during powder-bed-based, layer by layer, additive manufacturing (AM). The presented model includes algorithms for random powder layer generation, electron beam energy absorption, evaporation, capillarity and wetting, meltpool dynamics, its temperature evolution and face centered cubic grain solidification. The model is first validated against the experimental findings of single track electron beam melting and solidification of a baseplate and then applied to simulate the grain structure produced during AM. Influence of the hatching strategy on grain structure is presented as well as stray grain formation resulting from partially molten powder particles. (C) 2016 Elsevier B.V. All rights reserved.