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Meeting 2020 TMS Annual Meeting & Exhibition
Symposium Powder Materials for Energy Applications
Presentation Title Effect of Particle Spreading Dynamics on Powder Bed Quality
Author(s) Yousub Lee, Kate A. Gurnon, Srdjan Simunovic
On-Site Speaker (Planned) Yousub Lee
Abstract Scope In powder bed additive manufacturing (AM), powder spreading process often leads to inhomogeneity in layer height, porosity level, and particle size distribution. Hence, the creating of homogeneous layers is the first task for optimal printing. The conventional assessment methods for powder bed quality are limited to a measurement of powder morphology, flowability, particle size distribution, surface roughness, and packing density. However, those techniques may not be the most appropriate to quantify the bed characteristics since it is not able to capture local particle configuration and does not provide any vectoral information (e.g., arrangement of contacts between particles during spreading). In this study, 1) discrete element method (DEM) model was developed for multiple-layer powder spreading process, 2) powder spreading dynamics including angle of repose (AOR) was measured using high-speed camera, 3) the effect of particle spreading dynamics on spatial powder bed structure and quality were investigated using scalar and tensorial methods.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

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Fabrication of Complex Shape Components by Spark-plasma Sintering Utilizing 3D-printed Controllable Interface
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Flash Sintering: From Fundamental Science to Energy-saving Materials Processing
Influence of Powder Microstructure on Cold Spray Deposited Cr Coatings for High Temperature Oxidation Resistance
Investigation of the Powder Processing of Near-final Shape AlNiCo Magnets for Eventual Use in Electric Drive Motors
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Materials for Nuclear Applications Produced by Powder-based Techniques
Microstructural Evolution of a Nanostructured Ferritic Alloy Composite during In-situ Ion Irradiation
Microstructural Evolution of NFA and Cr3C2@SiC-NFA Composite during Ion Irradiation
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Next Stage Development of Iron-based GARS Alloy Powders for Cold Spray Deposition of ODS Structural Materials for Extreme Environments
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Processing and Characteristics of Nanostructured Ferritic Alloys for Nuclear Reactor Applications
Superelastic Zirconia Powder for Shockwave Dissipation in Energy Infrastructure
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