|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Fundamental Aspects and Modeling Powder Metal Synthesis and Processing
||Particle Charging during Electron-beam Additive Manufacturing
||Zachary C Cordero, Harry M Meyer, Peeyush Nandwana, Ryan R Dehoff
|On-Site Speaker (Planned)
||Zachary C Cordero
Electrons injected into the build envelope during electron-beam additive manufacturing can accumulate on the irradiated particles and cause them to repel each other. In extreme cases, these electrostatic forces can grow so large that they drive the particles from the powder-bed in a process termed “smoking”. Here we will describe a model of powder bed charging that can identify the conditions under which a given powder will smoke. We will compare this model’s predictions with various trends that have been observed in practice, and provide examples of how these predictions can be used in quality control and process design in order to suppress smoking.