使用超高速定向能沉积(EHLA3D)沉积IN718薄壁结构的工艺开发和工艺适应指南

IF 1.7 4区 工程技术 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
Min-Uh Ko, Zongwei Zhang, Thomas Schopphoven
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引用次数: 0

摘要

超高速定向能沉积(EHLA)是激光定向能沉积(ed - lb)的改进版本,是一种用于旋转对称部件的高效涂层工艺。EHLA工艺的特点是进料速度高达200米/分钟,与传统的d - lb相比,这导致焊缝沉积更小,层厚度更薄。当转移到增材制造时,该特性利用了以沉积速率沉积薄壁细丝结构的潜力,这与典型的d - lb工艺(EHLA3D)相当。这项工作的结果是通过EHLA3D机器实现的,这是一种改进的cnc型机器,能够运行vf = 30 m/min的进给速度。本文研究了用镍基高温合金IN718沉积薄壁丝状组织的工艺参数。在恒定的进给速率下,沉积了单轨迹,并分析了光束直径和粉末质量流量的变化,以及由此产生的焊缝尺寸和稀释区。然后,选择工艺参数并将其转移到薄壁沉积中,并定义了薄壁沉积参数的适应准则。开发了两个参数集来评估EHLA3D沉积的可行壁厚。根据开发的参数集,可以实现300至500 μm之间的壁厚。为了表征所得到的薄壁,进行了表面粗糙度测量和金相截面。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Process development and process adaption guidelines for the deposition of thin-walled structures with IN718 using extreme high-speed directed energy deposition (EHLA3D)
Extreme high-speed directed energy deposition (EHLA) is a modified variant of the laser based directed energy deposition (DED-LB) and is being applied as an efficient coating process for rotational symmetric components. Characteristics of EHLA processes are feed rates of up to 200 m/min, which result in smaller weld bead deposition and thinner layer thicknesses compared to conventional DED-LB. When transferred to additive manufacturing, this characteristic utilizes the potential of depositing thin-walled filigree structures at deposition rates, which are comparable to typical DED-LB processes (EHLA3D). The results of this work were achieved with an EHLA3D machine, which is a modified CNC-type machine capable of operating feed rates with vf = 30 m/min. In this work, process parameters were developed for the deposition of thin-walled filigree structures with the Ni-based superalloy IN718. Single tracks with constant feed rates and a variation in the beam diameter and powder mass flow were deposited and analyzed regarding the resulting weld bead dimension and dilution zone. Then, process parameters were selected and transferred to the deposition of thin walls, and guidelines of the parameter adaption toward thin-walled deposition were defined. Two parameter sets were developed to assess the feasible wall-thicknesses deposited by EHLA3D. Depending on the developed parameter sets, wall thicknesses between 300 and 500 μm are achieved. To characterize the resulting thin-walls, surface roughness measurements and metallographic cross sections were conducted.
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来源期刊
CiteScore
3.60
自引率
9.50%
发文量
125
审稿时长
>12 weeks
期刊介绍: The Journal of Laser Applications (JLA) is the scientific platform of the Laser Institute of America (LIA) and is published in cooperation with AIP Publishing. The high-quality articles cover a broad range from fundamental and applied research and development to industrial applications. Therefore, JLA is a reflection of the state-of-R&D in photonic production, sensing and measurement as well as Laser safety. The following international and well known first-class scientists serve as allocated Editors in 9 new categories: High Precision Materials Processing with Ultrafast Lasers Laser Additive Manufacturing High Power Materials Processing with High Brightness Lasers Emerging Applications of Laser Technologies in High-performance/Multi-function Materials and Structures Surface Modification Lasers in Nanomanufacturing / Nanophotonics & Thin Film Technology Spectroscopy / Imaging / Diagnostics / Measurements Laser Systems and Markets Medical Applications & Safety Thermal Transportation Nanomaterials and Nanoprocessing Laser applications in Microelectronics.
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