|About this Abstract
||Materials Science & Technology 2019
||Additive Manufacturing: Effective Production, Characterization, and Recycling of Powder Materials
||Synchrotron X-ray CT of AM Feedstock Metal Powder: A Validation of Metallographic Porosity Measurements.
||Timothy E. Prost, Chih-Pin Chuang, Dileep Singh, Emma White, Iver Anderson
|On-Site Speaker (Planned)
||Timothy E. Prost
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.
||Planned: At-meeting proceedings