|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Advanced Characterization with Synchrotron, Neutron, and In Situ Laboratory-scale Techniques II
||In-situ Characterization of Melt Flow Instability in Laser Metal Additive Manufacturing
||Qilin Guo, Minglei Qu, S. Mohammad H. Hojjatzadeh, Luis I. Escano, Zachary Young, Kamel Fezzaa, Lianyi Chen
|On-Site Speaker (Planned)
Melt flow plays a critical role in laser melt additive manufacturing, controlling the melt pool development, defect formation/evolution, solidification, and spatter generation. However, during common process designing or modeling, the melt flow is always assumed to maintain a “regular” pattern within a melt pool, without considering the unstable flow behavior. Here, we report the melt flow instability in laser metal additive manufacturing process. By in-situ high-speed high-energy synchrotron X-ray imaging, for the first time, we will reveal the mechanisms for causing the instabilities of melt flow, as well as the consequences brought by the unstable flow in additive manufacturing process. The results provide crucial insights into laser additive manufacturing processes.
||Additive Manufacturing, Characterization, Other