研究目的
To investigate the influence of surface tension on the molten pool morphology in laser melting using the Smoothed Particles Hydrodynamics (SPH) method.
研究成果
The study concludes that surface tension significantly influences the molten pool morphology during laser melting, with deformation distributions increasing with laser power or decreasing scanning speed. The SPH method effectively simulates these phenomena, and experimental results validate the model's predictions.
研究不足
The study does not account for the influences of recoil pressure and ambient gas on the molten pool morphology. Additionally, the model assumes uniform and continuous distributions of the powder layer, which may not fully capture the natural deviations in experimental conditions.
1：Experimental Design and Method Selection:
A mathematical model of surface tension on the molten pool morphology is established based on the SPH method, considering the temperature change of the molten pool.
2：Sample Selection and Data Sources:
The study uses a single layer powder system of 304 L stainless steel.
3：List of Experimental Equipment and Materials:
The main thermophysical properties and processing parameters are listed, including laser power and scanning speed.
4：Experimental Procedures and Operational Workflow:
The simulation involves a two-dimensional transient model to analyze the morphology of the molten pool under various processing parameters.
5：Data Analysis Methods:
The distributions of length and depth of the molten pool are analyzed to understand the effects of processing parameters.
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