|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Building the Pathway towards Process and Material Qualification
||High-speed Synchrotron X-ray Imaging of Laser Powder Bed Fusion Process
||Cang Zhao, Kamel Fezzaa, Ross Cunningham, Lianyi Chen, Anthony Rollett, Tao Sun
|On-Site Speaker (Planned)
Laser powder bed fusion (LPBF) is a highly dynamic process due to the extremely high heating and cooling rates involved. Many transient phenomena occur in a LPBF process during laser-metal interaction, such as melting and partial vaporization of metallic powders, flow of the melt pool, powder flow and ejection, rapid solidification, non-equilibrium phase transition, etc. The interplays between these complex processes often result in a product with microstructure defects and inaccurate dimension. To observe the dynamic microstructure evolution of materials inside the powder bed and the metal base, we recently carried out high-speed synchrotron x-ray imaging experiments at the 32-ID-B beamline of the Advanced Photon Source. It is demonstrated that quantitative structural information on melt pool size/shape, powder ejection, and solidification can be obtained from the high-resolution time-resolved x-ray images. We believe the experiment platform we developed will facilitate the advance of laser metal additive manufacturing technology.
||Planned: Supplemental Proceedings volume