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首页> 外文期刊>Journal of Materials Engineering and Performance >Multiscale Modeling of Microstructural Evolution in Fused-Coating Additive Manufacturing
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Multiscale Modeling of Microstructural Evolution in Fused-Coating Additive Manufacturing

机译：熔融涂料添加剂制造中微观结构演化的多尺度建模

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摘要

A quantitative phase field model with adaptive-computational-domain-expansion (ACDE) method was developed to simulate the microstructural evolution in fused-coating additive manufacturing process. A heat transfer and fluid flow model was established to investigate the solidification behavior of the molten pool in a single deposited layer. The solidification parameters such as temperature gradient and solidification rate were calculated from the macroscopic model and then fed into the phase field model to get the microstructure at different positions within a single deposited layer. Columnar dendrites were formed at the bottom of the deposited layer, and equiaxed dendrites appeared in the upper part of the layer. The ACDE method is used to improve the simulation efficiency. The metallographic experiments and energy-dispersive spectrometer analysis for composition were conducted on the fused-coating specimen, and the results were in good accordance with the simulations.
机译：开发了具有自适应 - 计算域 - 膨胀（ACDE）方法的定量相场模型以模拟熔融涂层添加剂制造过程中的微观结构演变。 建立了传热和流体流动模型，以研究单个沉积层中熔池的凝固行为。 从宏观模型计算诸如温度梯度和凝固率的凝固参数，然后进入相位模型以使微结构在单个沉积层内的不同位置。 在沉积层的底部形成柱状树突，并且等轴的树突出现在层的上部。 ACDE方法用于提高模拟效率。 在熔融涂层样品上进行组合物的金相实验和能量 - 分散谱仪分析，结果良好地符合模拟。

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