TEMPERATURE DISTRIBUTION AND FLUID FLOW MODELING OF ELECTRON BEAM MELTING® (EBM)

机译：电子束熔化®（EBM）的温度分布和流体流动模型

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A three-dimensional (3D) numerical model is developed by using control volume method to analyze the effects of the electron beam scanning speed on the temperature distribution and fluid flow of the liquid phase in the electron beam melting® (EBM) of Ti-6A1-4V powder. The numerical calculations are performed by Fluent codes, in which thermal analyses with and without considering fluid flow in the molten pool are compared. A series of experiments are performed with an Electron Beam Melting® machine to verify the numerical accuracy. Compared to thermal analysis without considering convection in the molten pool, a closer numerical prediction of geometrical size of molten pool to the experimental data can be achieved by using thermal and fluid flow modeling. The difference between the melt pool geometry in the two models is due to the consideration of the effects of the outward flow in the fluid flow model caused by surface tension.

机译：通过控制体积法建立了三维（3D）数值模型，以分析电子束扫描速度对Ti-6A1的电子束熔化（EBM）中液相的温度分布和流体流动的影响-4V粉末。数值计算是通过Fluent代码执行的，其中比较了考虑和不考虑熔池中流体流动的热分析。用Electron BeamMelting®机器进行了一系列实验，以验证数值精度。与不考虑熔池中对流的热分析相比，通过使用热和流体流动模型，可以实现熔池几何尺寸与实验数据更接近的数值预测。两种模型中熔池几何形状之间的差异是由于考虑了由表面张力引起的流体流动模型中向外流动的影响。

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《ASME international mechanical engineering congress and exposition》|2013年|3089-3101|共13页
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M. Jamshidinia; F. Kong; R. Kovacevic;
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4. TEMPERATURE DISTRIBUTION AND FLUID FLOW MODELING OF ELECTRON BEAM MELTING? (EBM) [C] . M. Jamshidinia, F. Kong, R. Kovacevic American Society of Mechanical Engineers International Mechanical Engineering Congress and Exposition . 2013

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TEMPERATURE DISTRIBUTION AND FLUID FLOW MODELING OF ELECTRON BEAM MELTING® (EBM)

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