|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Fundamental Aspects and Modeling Powder Metal Synthesis and Processing
||Fundamental Parameters for Control of Two-Fluid Close-Coupled Gas Atomization: Process Observations and Modeling with Correlations to Metal Powder Yields
||Iver Anderson, Emma Marie Hamilton White, Jonathan D. Regele, Vince McDonell, David J. Byrd, Ross D. Anderson
|On-Site Speaker (Planned)
Advances in fundamental understanding of close-coupled gas atomization, the preferred large-scale industrial technology for synthesis of precision metal and alloy powders, is required to open up a new era for advanced powder and spray processing. Advanced manufacturing applications that demand these advances include additive manufacturing, metal injection molding, thermal spray deposition, and atomization spray deposition. At the heart of these advances is precise control of the droplet breakup mechanism with extreme uniformity from a melt sheet or ligament source within a highly localized atomization zone, which promotes close control of the energy transfer process that produces the droplet spray. High speed observations of discrete-jet close-coupled gas atomization with open or closed wake gas flow and pre-filming melt pour tubes provided in operando parameters for use in atomization breakup modeling and simulation. Resulting powder size distributions were compared to predicted behavior. Supported by USDOE-EERE-Advanced Manufacturing Office through Ames lab contract DE-AC02-07CH11358.