| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Materials Design and Alloy Development II
|
| Presentation Title |
Understanding Microstructure Development of Additively Manufactured Ni-based Superalloys by Combining In-situ/Ex-situ Characterization and Computational Modeling |
| Author(s) |
Jonah Klemm-Toole, Alec Saville, Chandler Gus Becker, Benjamin Ellyson, Yaofeng Guo, Chloe Johnson, Brian Milligan, Andrew Polonsky, Kira Pusch, Kester Clarke, Niranjan Parab, Kamel Fezzaa, Tao Sun, Damien Tourret, Tresa Pollock, Amy Clarke |
| On-Site Speaker (Planned) |
Jonah Klemm-Toole |
| Abstract Scope |
Additive manufacturing unlocks the possibility of producing highly complex metallic structures with location and orientation specific properties. In order to control microstructure 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 model Ni-based superalloys with controlled 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 computational models used to estimate thermal gradients. Ex-situ microscopy was performed to characterize the microstructure after solidification. Current solidification theories are invoked to relate the measured solidification velocities and thermal gradients to the observed morphology and crystallographic texture after solidification. By combining in-situ/ex-situ characterization and computational modeling of the solidification process, new insights have been developed into the microstructural and crystallographic texture evolution in additively manufactured Ni-based superalloys. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |