| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in the State-of-the-Art of High Temperature Alloys
|
| Presentation Title |
New Strengthening Mechanisms in Ni-base Superalloys |
| Author(s) |
Michael J. Mills, Ashton Egan, Timothy Smith, Longsheng Feng, Milan Heczko, Yunzhi Wang, Emmanuelle Marquis |
| On-Site Speaker (Planned) |
Michael J. Mills |
| Abstract Scope |
Polycrystalline Ni-based superalloys are vital materials for disks in the hot section of aerospace and land-based turbine engines, and improving fuel efficiency and reducing greenhouse gas emissions compel increased performance at higher temperatures. In this presentation, two different approaches to improving high temperature strength and creep resistance are discussed. In the first approach, local ordered phases at stacking faults and microtwins can be accomplished by subtle changes to the alloy composition. Characterization that demonstrates this local phase transformation strengthening, and computational design for promoting this new mechanism will be discussed. In the second approach, oxide dispersion strengthening using a novel approach for introducing the oxide reinforcements has been demonstrated recently in work at NASA Glenn Research Center. The understanding of these benefits based on advanced characterization of the as-built and post-deformed substructures will also be presented. Pursuing possible synergies between these two approaches will also be discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, High-Temperature Materials, Phase Transformations |