结合计算流体动力学-离散元件方法模型用于研究非传统激光粉末床融合过程中的粉末效应
Trong-Nhan Le1,2, Yu-Lung Lo1,3, Wei Hung1
1Department of Mechanical Engineering, National Cheng Kung University, Tainan, Taiwan.
3D printing and additive manufacturing
|October 3, 2024
概括
这项研究使用3D模拟来探索室内压力和重力如何影响激光粉床聚变 (L-PBF) 中的金属蒸汽喷出. 调整重力可以有效地减少在L-PBF过程中喷和粉末床脱皮.
科学领域:
- 增材制造 增材制造 增材制造
- 材料科学 材料科学 材料科学
- 计算机建模 计算建模
背景情况:
- 激光粉末床融合 (L-PBF) 是一种先进的增材制造技术.
- 在L-PBF过程中喷出的金属蒸汽可以导致诸如喷和粉末床脱等缺陷.
- 控制这些缺陷对于提高零件质量和工艺可靠性至关重要.
研究的目的:
- 开发和使用3D计算流体动力学-离散元件方法 (CFD-DEM) 合模拟模型.
- 为了研究SS316L金属蒸汽在单扫描轨道L-PBF过程中喷出的粒子动态.
- 检查非传统工艺变量的影响,特别是室内压力和引力,对喷和脱光抑制的影响.
主要方法:
- 实施一个全面的3DCFD-DEM合模拟模型.
- 模拟SS316L金属蒸汽喷出动力学在不同的室内压力和引力下.
- 分析颗粒的行为,以量化喷雾形成和粉末床排泄.
主要成果:
- 调整引力被发现是一种有效的方法,可以抑制喷雾形成和粉末床排泄.
- 室内压力对脱皮现象表现出边际影响.
- 较高的室内压力促进了金属蒸汽的上升,而较低的压力导致了更大的辐射分布.
结论:
- 室内压力和引力都显示出潜力,作为抑制L-PBF中喷射和脱光现象的可行方法.
- 这些发现特别适用于轻质材料的L-PBF加工.
- 开发的CFD-DEM模型为优化L-PBF过程参数提供了有价值的工具.
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