|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Building the Pathway towards Process and Material Qualification
||A-82: In-Process Layer-by-layer Surface Characterization of Metals Fabricated using Laser Engineered Net Shaping (LENS)
||Andrew Kustas, David Keicher, Michael T. Brumbach, Brendan L. Nation, Nicolas Argibay
|On-Site Speaker (Planned)
Widespread commercial adoption of metal additive manufacturing (AM) technologies is limited largely due to part and process variability. Limited understanding of the correlations between processing parameters (e.g., laser power, build velocity, print pattern, etc.) and process signatures (e.g., temperature and geometry of the melt pool and solidified material) remains a challenge to reducing this variability through process controls. Recent efforts have focused on developing in situ/in-process characterization tools to start linking these correlations and eventually enable effective process control. Relatively few studies have focused on establishing connections between processing parameters, processing signatures and solidified layer defects. We present a demonstration of real time in-process surface topography measurements during a laser engineered net shaping (LENS) operation using a confocal chromatic white light line sensor (CCWLLS). This technique rapidly generates high resolution (~ 2 µm lateral, 80 nm axial), 3-D surface reconstructions of each build layer. Potential of utilizing this instrument to establish quantitative structure-property relationships derived from in-process high-resolution multi-scale surface metrology and ex situ characterization of AM metal parts is also discussed.
||Planned: Supplemental Proceedings volume