| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Microstructural Templates Consisting of Isostructural Ordered Precipitate / Disordered Matrix Combinations: Microstructural Evolution and Properties
|
| Presentation Title |
Understanding the Role of Chemistry on Planar Fault Energies in A3B Compositions |
| Author(s) |
K V Vamsi, Tresa M. Pollock |
| On-Site Speaker (Planned) |
K V Vamsi |
| Abstract Scope |
Superalloys are one such class of alloys where the L12 and D022 (A3B type) ordered precipitates provide significant strengthening by impeding the motion of the dislocations through the precipitates. The presence of these ordered precipitates results in a variety of deformation modes involving various superlattice stacking faults. Though the research in this field has advanced over a few decades, the effect of chemistry on the role of planar fault energies is not well understood. Recent advancements in emerging high-entropy alloys (HEAs) have opened up new avenues for exploring novel precipitate strengthened multicomponent alloys, and challenges in estimating fault energies in multicomponent compositions will be highlighted. Modeling planar fault energies in L12 and D022 structures with state-of-the-art methods will be reviewed. Deriving planar fault energies using a novel diffuse multi-layer fault model for CoNi-based precipitate compositions will be presented, and implications on the alloy design will be discussed. |
| Proceedings Inclusion? |
Planned: |