| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Solid-State Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Microstructure and Texture Evolution During Printing and Post Processing of Ni-based Superalloy |
| Author(s) |
Colleen Hilla, Wei Zhang, Michael Mills, Alber Sadek, Hyeyun Song |
| On-Site Speaker (Planned) |
Colleen Hilla |
| Abstract Scope |
Texture and microstructure impact the mechanical behavior of Ni-based superalloys. By leveraging unique thermal conditions of additive manufacturing, different microstructures can be explored for their effects on mechanical properties. A directionally solidified microstructure with a square/lattice cross section is seen in some laser powder bed (LPBF) builds. This study aims to identify the factors that produce this microstructure, analyze the stability during post processing and determine the effect on mechanical behavior. The microstructure and texture of Rene 65 printed by LPBF were analyzed using EBSD. Track-by-track heat conduction modeling was used to isolate the conditions under which this microstructure forms. Heat treatments were carried out in the subsolvus and supersolvus conditions. Both heat treatments led to precipitate formation, but only the supersolvus heat treatment caused recrystallization. Tensile and creep tests were completed in the as-built and heat treated conditions, and the effect of microstructure on the mechanical properties was analyzed. |
| Proceedings Inclusion? |
Planned: |