| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Materials Design and Alloy Development II
|
| Presentation Title |
ICME-based Design of γ’-strengthened Co-based Superalloys for Additive Manufacturing |
| Author(s) |
Eric A. Lass, Michael B. Katz, Richard E. Ricker |
| On-Site Speaker (Planned) |
Eric A. Lass |
| Abstract Scope |
Two-phase γ-γ’ Ni-based superalloys are of significant interest for use in additive manufacturing (AM) applications. Unfortunately, the properties of most Ni-based superalloys are not conducive to AM processing, such as inherently large solidification temperature ranges, microsegregation, and γ’ precipitation behavior, all of which can lead to cracking during AM processing and other issues. Over the last decade, Co-based superalloys with an analogous two-phase γ-γ’ microstructure have been discovered, investigated and developed. This new class of superalloys exhibit properties that are more amenable to AM processing than their Ni-based counterparts including significantly narrower freezing ranges and minimal solidification microsegregation. This work uses an Integrated Computational Materials Engineering approach in designing Co-based superalloys with intriguing properties for use in AM applications. Calphad-based thermodynamic and kinetic models are employed to quantify microstructural stability, solidification and precipitation behavior, and other properties. Selected alloys are characterized experimentally for their potential as AM materials. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |