| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
2023 Technical Division Student Poster Contest
|
| Presentation Title |
SPU-15: Using Microstructural Modifications to Influence Intense Strain Localization in Inconel 718Plus |
| Author(s) |
Olivia Egbers, Jenna Benko, Nathan Heniken, Michael J Mills, Semanti Mukhopadhyay |
| On-Site Speaker (Planned) |
Olivia Egbers |
| Abstract Scope |
AllvacŪ718Plus™ is a novel Nickel-based superalloy with superior mechanical properties, good creep resistance, and high-temperature capability. The superior properties of this superalloy are heavily influenced by its microstructure, which comprises g’ (Ni3Al) precipitates in a Ni solid solution matrix. Under external loading, this superalloy exhibits intense strain localization adjacent to annealing twin boundaries (ATBs), which can be sites for crack initiation. Recent findings suggest that strain localization in some superalloys may be caused by precipitate-free zones (PFZ) near ATBs. In the present work, we attempted to investigate the role of heat treatments on PFZ adjacent to annealing twin boundaries. We designed several novel heat treatments using ThermoCalc’s TC Prisma module to minimize or eliminate PFZs. Then we characterized the heat-treated samples using scanning electron microscopy (SEM) and scanning transmission electron microscopy (STEM). Finally, we assessed strain localization in the newly designed microstructures using in-situ tensile testing and digital image correlations. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
High-Temperature Materials, Phase Transformations, Mechanical Properties |