|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Establishing Location Specific, Processing-Microstructure-Property-Relationships III
||Dynamics of Laser Powder Bed Fusion Additive Manufacturing Process
||Qilin Guo, Luis Escano, Cang Zhao, Lianghua Xiong, Seyed Mohammad Hassan Hojjatzadeh, Tao Sun, Lianyi Chen
|On-Site Speaker (Planned)
Understanding the physics of laser powder bed fusion (LPBF) processes is critical for establishing location-specific processing-microstructure-property relationships. The non-transparency of metals to visible light and the highly localized (tens of micrometers) and very short (tens of microseconds) interaction of a laser beam with metal powders during LPBF pose a huge challenge to the characterization and understanding of this process. The detailed physics of the LPBF process and the mechanisms of defect formation and microstructure evolution are still not clear. In this talk, I will present our ongoing research on characterizing the dynamics of laser powder bed fusion additive manufacturing processes by high-energy high-speed x-ray imaging, with a focus on the dynamics of laser-powder interaction. The physics governing powder moving and spattering during laser melting will be discussed. The results obtained in this work are important for establishing the location-specific processing-microstructure relationships in LPBF of metals.
||Planned: Supplemental Proceedings volume