激光粉末床熔融增材制造中的粉末铺展机制：基于离散元法的实验与计算方法

Powder Spreading Mechanism in Laser Powder Bed Fusion Additive Manufacturing: Experiments and Computational Approach Using Discrete Element Method.

作者信息

Habiba Ummay, Hebert Rainer J

机构信息

Department of Materials Science and Engineering, Institute of Materials Science, University of Connecticut, Storrs, CT 06269-3136, USA.

出版信息

Materials (Basel). 2023 Apr 1;16(7):2824. doi: 10.3390/ma16072824.

DOI:10.3390/ma16072824

PMID:37049118

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10095776/

Abstract

Laser powder bed fusion (LPBF) additive manufacturing (AM) has been adopted by various industries as a novel manufacturing technology. Powder spreading is a crucial part of the LPBF AM process that defines the quality of the fabricated objects. In this study, the impacts of various input parameters on the spread of powder density and particle distribution during the powder spreading process are investigated using the DEM (discrete element method) simulation tool. The DEM simulations extend over several powder layers and are used to analyze the powder particle packing density variation in different layers and at different points along the longitudinal spreading direction. Additionally, this research covers experimental measurements of the density of the powder packing and the powder particle size distribution on the construction plate.

摘要

激光粉末床熔融（LPBF）增材制造（AM）已被各行业采用，作为一种新型制造技术。粉末铺展是LPBF增材制造过程的关键部分，它决定了所制造物体的质量。在本研究中，使用离散元法（DEM）模拟工具研究了各种输入参数对粉末铺展过程中粉末密度分布和颗粒分布的影响。DEM模拟涵盖了多个粉末层，并用于分析不同层以及沿纵向铺展方向不同点处的粉末颗粒堆积密度变化。此外，本研究还包括对建筑板上粉末堆积密度和粉末粒度分布的实验测量。