|About this Abstract
||Materials Science & Technology 2019
||Additive Manufacturing of Metals: Microstructure and Material Properties of Nickel-based Alloys
||Combining In-Situ/Ex-Situ Characterization and Solidification Modeling to Understand Microstructure Selection in Additively Manufactured Ni-based Alloys
||Jonah Klemm-Toole, Alec Saville, C. Gus Becker, Benjamin Ellyson, Yaofeng Guo, Chloe Johnson, Brian Milligan, Andrew Polonsky, Kira Pusch, Kester Clarke, Damien Tourret, Niranjan Parab, Kamel Fezzaa, Tao Sun, Tresa Pollock, Amy Clarke
|On-Site Speaker (Planned)
Additive manufacturing unlocks the possibility of producing highly complex metallic structures with location and orientation specific properties. In order to control morphology and crystallographic orientation during solidification, a comprehensive understanding of the thermal gradients and solidification velocities and their impact on the solidification process must be developed. Single crystals of Ni-based superalloys with controlled starting crystallographic orientations were laser melted, while obtaining in-situ x-ray radiography to directly measure the velocity of the solid-liquid interface. These results are used to inform complementary phase field simulations. Post-mortem microscopy was also performed to characterize the microstructure after solidification. By combining in-situ/ex-situ characterization and computational modeling of the solidification process, new insights have been developed into the evolution of microstructure selection in additively manufactured Ni-based superalloys.
||Planned: At-meeting proceedings