|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||Additive Manufacturing and Innovative Powder/Wire Processing of Multifunctional Materials
||Consequences of Powder Reuse on Microstructure Evolution during Laser Powder Bed Fusion of 316L Stainless Steel
||Madelyn Madrigal-Camacho, Mitchell Keeler, Joy Gockel, Suveen N. Mathaudhu
|On-Site Speaker (Planned)
Successive reuse processes lead to changes in powder morphology, chemical composition, and microstructure in the recovered powder. In the case of 316L stainless steel, literature reports successful powder reuse within 12-30 consecutive cycles, however, a detailed understanding of the effect of powder degradation on the final part quality is unexplored. Therefore, the primary goal of this study is to enable the rapid degradation of the powder feedstock under conditions which can be transferable to manufacturing processes. With this approach, the effects of the thermally dynamic powder-laser interactions and the instrument process parameters on reused powder characteristics can be explored. The results provide insight to the consequences of the melt pool behavior with the instabilities of the altered powder, solidification modes, microstructure, evolution of spatter and porosity in the as-built components. These observations point to important considerations to design a standard method for reusing powder in powder bed fusion processes.
||Additive Manufacturing, Powder Materials, Characterization