|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Fundamental Aspects and Modeling Powder Metal Synthesis and Processing
||Characterizing the Effect of Powder Properties on In-Machine Performance in Powder Bed Direct Metal Additive Manufacturing
||Ross Cunningham, Ola Harrysson, Jack Beuth, Fred Higgs III, Anthony Rollett
|On-Site Speaker (Planned)
This talk outlines an on-going project supported by America Makes that seeks to expand the range of powders available for both selective laser melting (EOS) and electron beam melting (Arcam) AM processes. Multiple material systems of interest with varying size distributions and morphologies were investigated. Size and morphology were characterized using SEM analysis and image analysis software, as well as 3D XCT. Rheological behavior was analyzed on a Freeman FT4 Rheometer. Process variables were adjusted as needed in order to achieve successful builds. Successful results from two new Ti-6Al-4V powders in the Arcam were obtained, one of which has a much larger size distribution than the standard powder, demonstrating the ability to significantly broaden the range of available powders. Porosity in printed material is related to porosity in the powders. Porosity can be reduced via varying the process conditions.