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Meeting Materials Science & Technology 2020
Symposium Additive Manufacturing: Qualification and Certification
Presentation Title Unveiling the Relationships between Powder Bed Conditions and Materials Quality during Selective Laser Melting
Author(s) Tan Phuc Le, Matteo Seita
On-Site Speaker (Planned) Matteo Seita
Abstract Scope All powder bed additive manufacturing processes involve spreading a thin layer of powder feedstock that is selectively consolidated, either thermally or chemically. The characteristics of this powder layer—such as its packing density, thickness uniformity, and contamination level—strongly affect the quality of the resulting parts. In this work, we demonstrate the capability of acquiring this information in-situ—layer by layer—using a “powder bed scanner” (PBS). The PBS consists of a re-coater that integrates a contact image sensor to image the entire powder bed at high spatial resolution. We use the PBS during selective laser melting of stainless steel 316L and correlate site-specific powder bed features to the porosity and microstructure of 3D printed samples. These results provide insights into the relationships between powder bed conditions and part quality, and open a new pathway to in-line monitoring of powder bed additive manufacturing processes.
Proceedings Inclusion? Undecided


A Comprehensive Digital Platform for Additive Manufacturing
A Multi-Sensor Comparative Study for Fatigue Prognosis of Additively Manufactured Metallic Specimens
Connecting Metal Powder Morphological Characteristics with Flowability Properties Using Machine Learning
CT Based Analysis of Generation and Characterization of Parameter- and Process-induced Defects in Powder Bed Fusion Additive Manufacturing
Effect of Sample Geometry and Orientation on Tensile Properties of Ti-6Al-4V Manufactured by Electron Beam Melting
Ensuring Build Quality thru Physics-based Support Design Optimization for Residual Stress
Influence of Printing Parameters within the Binder-powder Interaction
Introductory Comments: Additive Manufacturing: Qualification and Certification
Physics-based Qualification for Laser Powder Bed Fusion AM
Pore Formation in Laser Powder Bed Fusion Inconel 718 through Multiphysics Modeling
Post-build Heat Treatment of Wire-arc Additive Manufactured 410 SS for Hardness Tuning
Recyclability of Ti-6Al-4V Powders Used in Additive Manufacturing
Reducing Anisotropic Deformation of LPBF Inconel 718 for Applications in Extreme Conditions
Reducing Heat Buildup and Regularizing Melt Pool Dimensions in Laser Powder Bed Fusion through a “Powder Moat” Scan Strategy
Similarity Analysis and Clustering of Thermal History to Understand Process-structure Relationships
Simulation of the Effect of Texture on Anisotropy in SLM-Produced IN718 Microstructures
The Effects of Powder Particle Size Distribution on the Powder and Part Performance of Laser Powder Bed Fusion 17-4 PH Stainless Steel
Unveiling the Relationships between Powder Bed Conditions and Materials Quality during Selective Laser Melting

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