Thermographic Measurements of the Commercial Laser Powder Bed Fusion Process at NIST.
Thermographic Measurements of the Commercial Laser Powder Bed Fusion Process at NIST.
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DOI：
10.1108/rpj-11-2015-0161
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发表时间：
2016
影响因子：
3.9
通讯作者：
Ma L
中科院分区：
文献类型：
--
作者：
Lane B;Moylan S;Whitenton E;Ma L
激光粉末床熔融 (L-PBF) 工艺中高温熔池区域的测量是研究人员的主要关注点，以进一步了解加热、熔化、粘合和冷却的动态物理原理，这些定义了这种商业上流行的增材制造工艺。本文将详细介绍在美国国家标准与技术研究所 (NIST) 进行的高速、高放大倍数原位热成像测量的设计、执行和结果，重点关注商业 L-PBF 工艺的熔池区域。观察到多种现象，包括等离子体羽流和熔化区域的热粒子喷射。将详细介绍热成像测量过程，重点是观察到的现象的“可测量性”和测量不确定性的来源。进一步的讨论将把这些热成像结果与 NIST 在 L-PBF 过程有限元模拟和现场传感和控制方法开发方面的其他努力联系起来。
Measurement of the high-temperature melt pool region in the laser powder bed fusion (L-PBF) process is a primary focus of researchers to further understand the dynamic physics of the heating, melting, adhesion, and cooling which define this commercially popular additive manufacturing process. This paper will detail the design, execution, and results of high speed, high magnification in-situ thermographic measurements conducted at the National Institute of Standards and Technology (NIST) focusing on the melt pool region of a commercial L-PBF process. Multiple phenomena are observed including plasma plume and hot particle ejection from the melt region. The thermographic measurement process will be detailed with emphasis on the ‘measurability’ of observed phenomena and the sources of measurement uncertainty. Further discussion will relate these thermographic results to other efforts at NIST towards L-PBF process finite element simulation and development of in-situ sensing and control methodologies.