【标题】Multi-Track Melt Pool Width Modeling in Powder Bed Fusion Additive Manufacturing
【参考中译】粉床熔化增材制造中的多轨熔池宽度建模
【类型】 期刊
【关键词】 Modeling; Control implementation; Powder bed fusion; Additive manufacturing; Control applications; Dynamics and control; Mechatronics
【参考中译】 建模;控制实施;粉末床融合;增材制造;控制应用;动力学和控制;机电一体化
【作者】 Dan Wang; Xu Chen
【摘要】 While powder bed fusion (PBF) additive manufacturing offers many advantages and exciting applications, its broader adoption is hindered by issues with reliability and variations during the manufacturing process. To address this, researchers have identified the importance of using both finite element modeling and control-oriented modeling to predict and improve the quality of printed parts. In this paper, we propose a novel control-oriented multi-track melt pool width model that utilizes the superposition principle to account for the complex thermal interactions that occur during PBF. We validate the effectiveness of the model by applying a finite element model of the thermal fields in PBF.
【参考中译】 虽然粉末床聚变（PBF）增材制造提供了许多优势和令人兴奋的应用，但其更广泛的采用因制造过程中的可靠性和变化问题而受到阻碍。为了解决这个问题，研究人员已经确定了使用有限元素建模和面向控制的建模来预测和提高印刷零件质量的重要性。在本文中，我们提出了一种新型的面向控制的多轨熔池宽度模型，该模型利用叠加原理来解释PBF期间发生的复杂热相互作用。我们通过应用PBF中热场的有限单元模型来验证该模型的有效性。
【来源】 ASME Letters in Dynamic Systems and Control 2023, vol.3, no.2
【入库时间】 2024/5/31
【标题】Effect of the Laser Power on the Geometrical Features of 316L Stainless Steel Additively Manufactured by Direct Laser Metal Deposition (DLMD)
【参考中译】激光功率对直接激光金属沉积（DLMD）增材制造316L不锈钢几何特征的影响
【关键词】 Fibre laser; 316L stainless steel; 4130 steel; Powder; Additive manufacturing (AM); Direct laser metal deposition (DLMD); Laser power; Geometrical features; Microstructure; Microhardness
【参考中译】 光纤激光器; 316L不锈钢; 4130钢;粉末;增材制造（AM）;直接激光金属沉积（DLMD）;激光功率;几何特征;微观结构;显微硬度
【作者】 O. Mehrabi; S. M. H. Seyedkashi; M. Moradi
【摘要】 Additive manufacturing (AM) is one of the most important and, of course, the most attractive technologies that has attracted the attention of industries and researchers in the last few decades. The direct laser metal deposition (DLMD) method is one of the AM methods that can be used to produce metal parts with good dimensional accuracy and quality. In this research the effect of laser power on the geometrical dimensions and microhardness of 316L stainless teel single-track layers additively manufactured by the DLMD method onto a 4130 steel substrate was studied. In addition, the microstructure of the 316L stainless steel DLMD layers was investigated. The height and the maximum width of the 316L stainless steel DLMD layer, the width of the interface, penetration depth, and microhardness characteristics of the 316L stainless DLMD single-track layers were considered as output responses. The results showed that by increasing the laser power, the height, maximum width of the 316L stainless steel DLMD layer, width of the interface, and penetration depth of the 316L stainless DLMD single-track layers increased. At the maximum laser power of 260 W the maximum height and maximum width of the 316L stainless steel DLMD layer and width of the interface of the 316L stainless steel DLMD layers were obtained at 830,970 and 615 μm, respectively. The microhardness of the samples varied from 281 to 314 HV. Examination of the microstructure of the 316L stainless steel DLMD layers showed solidification in columnar and equiaxed dendritic structures in all parts of the single-track layers, with the formation of secondary phases in the interdcndritic regions.
【参考中译】 在过去的几十年里，加法制造(AM)是最重要也是最有吸引力的技术之一，引起了工业界和研究人员的关注。直接激光金属沉积(DLMD)方法是制造具有良好尺寸精度和质量的金属零件的AM方法之一。研究了激光功率对用DLMD方法在4130钢表面添加316L不锈钢单道涂层的几何尺寸和显微硬度的影响。此外，还对316L不锈钢DLMD层的组织结构进行了研究。考虑了316L不锈钢DLMD层的高度和最大宽度、界面宽度、熔透深度以及316L不锈钢DLMD单道层的显微硬度特性作为输出响应。结果表明，随着激光功率的增大，316L不锈钢DLMD单轨层的厚度、最大宽度、界面宽度和穿透深度都有所增加。在最大激光功率为260W时，在830、970和615μm处分别获得了316L不锈钢的最大厚度和最大宽度以及316L不锈钢的最大界面宽度。样品的显微硬度在281~314HV之间变化。对316L不锈钢DLMD层的显微组织分析表明，单道层各部位均以柱状和等轴状枝晶组织凝固，并在晶间区域形成第二相。
【来源】 Lasers in Engineering 2023, vol.56, no.1/3
【标题】3D PRINTER FARM
【参考中译】3D打印机农场
【作者】 Michael McLeod
【摘要】 Mosaic Manufacturing announced it has begun shipping its self-contained print farm system, the Mosaic Array, which incorporates four of the company's Element HT 3D FFF printers. The Element HT feature a 14 x 14 x 14-inch build volume that can print up to 8 materials in a single part. Each printer also features a heated build volume and includes a high temp head (up to 500℃) and a low temp head (up to 300℃) that can be swapped out without tools. In total, the Array accommodates up to 32 individual material spools.
【参考中译】 Mosaic Manufacturing宣布已开始发货其独立打印场系统Mosaic Array，该系统集成了该公司的四台Element HT 3D FFF打印机。Element HT具有14 x 14 x 14英寸的构建体积，可以在单个零件中打印多达8种材料。每台打印机还具有加热构建体积，并包括一个高温打印头（高达500℃）和一个低温打印头（高达300℃），无需工具即可更换。该阵列总共可容纳多达32个单独的材料卷轴。
【来源】 Design Engineering 2023, no.Nov/Dec