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Meeting Materials Science & Technology 2019
Symposium Additive Manufacturing: Effective Production, Characterization, and Recycling of Powder Materials
Presentation Title Synchrotron X-ray CT of AM Feedstock Metal Powder: A Validation of Metallographic Porosity Measurements.
Author(s) Timothy E. Prost, Chih-Pin Chuang, Dileep Singh, Emma White, Iver Anderson
On-Site Speaker (Planned) Timothy E. Prost
Abstract Scope Increased design flexibility, rapid prototyping, and tailored microstructures of additive manufacturing (AM) have attracted industries operating across a myriad of material systems. Within electron beam melting (EBM) based AM processes, powder feedstock issues exist such as uneven layer formation, contamination, powder smoking, and residual porosity, often stemming from porosity found in commercially gas-atomized powder. In this study, high brilliance synchrotron X-ray computed tomography (CT) was performed at the Advanced Photon Source (APS) on powder samples produced via commercial systems as well as samples produced at Ames Laboratory. Correlations of porosity measurements between traditional metallographic sectioning of powder samples and CT values are made to ensure the validity of each type of analysis to better inform AM feedstock characterization methods and thus build quality. Support from USDOE-EERE-Advanced Manufacturing Office for Ames Laboratory through contract no. DE-AC02-07CH11358.765.
Proceedings Inclusion? Planned: At-meeting proceedings


Additive Manufacturing Alloys: Influence of Powder Preparation Method in Aluminum Matrix Composites
Assessment of 316L Stainless Steel Powder Produced from Recycled Machining Chips for Closed Lifecycle Additive-Subtractive Manufacturing
Characterization of Gas Atomized Aluminum Alloy Powder for Additive Manufacturing Applications
Characterization of Nickel-base Superalloy MAR-M247 Powders by Synchrotron X-ray Computed Tomography
Characterization of Titanium Powder Produced from Battlefield Scrap for Additive Manufacturing
Determination of Viscosity of Metal Melts by High Temperature Rheometry
Effects of Recycling PREP and Plasma Atomized Ti-6Al-4V Powder from LENS Process
Exploring the Feasibility of Cryomilled Aluminum Alloy 5083 as Feed Stock Material for Additive Manufacturing
Hydrogen Assisted Magnesiothermic Reduction (HAMR) for Making Low-oxygen Ti Powder
Metal Particulate Produced by Modulation-assisted Machining
P3-26: Identifying Correlations between Metal Powder Properties and Binder Jet Print Settings to Optimize Process
Potentials and Risks in Hybrid Manufacturing
Powder Specification Needs for Steels in the LPBF Process
Surface Area as a Powder Morphology Probe
Synchrotron X-ray CT of AM Feedstock Metal Powder: A Validation of Metallographic Porosity Measurements.
Understanding Powder Morphology and Its Effect on Flowability through Computer Vision and Machine Learning In Additive Manufacturing
Understanding Surface Area Measurement for Improved Powder Characterization

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