|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Building the Pathway towards Process and Material Qualification
||A-4:Comparing Micro-computed X-ray Tomography with Various Methods to Characterize Differently Atomized Inconel 625 Powders for Additive Manufacturing
||Shannon Biery, Colleen Hilla, Eamonn Hughes, Amir Mostafaei, Markus Chmielus
|On-Site Speaker (Planned)
Powder properties are essential to all powder based additive manufacturing processes and final part properties. In this study, three differently atomized Inconel 625 powders (water-atomized, air-melted Nitrogen-atomized, vacuum-melted Argon-atomized) are characterized with regards to average particle sizes, particle size distributions, particle shapes, chemical compositions and microstructures. Characterization of powders is accomplished using optical transmission measurements of liquid-phase sedimentation, sieving of powders, optical and scanning electron microscopy, accompanied by compositional analysis and x-ray diffraction. Use of micro-computed x-ray tomography (micro-CT) allows collection of 3-D images, using different resolutions (to below 1 Ám/pixel), along with measurements of particle size and shape of larger numbers of powder particles. The micro-CT results are compared with results from the other methods to determine which resolution should be used to characterize as-received metal powders prior to use in additive manufacturing. From this information, it is possible to correlate powder vs final product properties.
||Planned: A print-only volume