About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanics at the Extremes: Bridging Length-Scales From Nanoscale to Bulk
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| Presentation Title |
Dynamic Deformation Behavior of a TRIP-Assisted High-Entropy Alloys |
| Author(s) |
Janith C. Wanni, David R Jones, Daniel T Martinez, Dierk Raabe, Saryu Fensin |
| On-Site Speaker (Planned) |
Janith C. Wanni |
| Abstract Scope |
High-entropy alloys (HEAs) incorporating transformation-induced plasticity (TRIP) and dual-phase microstructures offer a pathway to overcome the strength–ductility trade-off. Building on prior work demonstrating exceptional performance under quasi-static loading, we examine the strain rate sensitivity of a metastable Fe₄₀Mn₄₀Co₁₀Cr₁₀ HEA. Split Hopkinson pressure bar (SHPB) tests and plate impact spall experiments were conducted to assess whether deformation-induced phase transformations persist under dynamic conditions. SHPB results confirm FCC-to-HCP transformation—validated by EBSD—and pronounced strain hardening, with flow stress increasing from an initial yield strength of ~300 MPa to ~800 MPa. This indicates effective retention of metastability-assisted toughening at moderate high strain rates. In contrast, under spall loading, minimal transformation was observed and no significant strength enhancement was seen relative to conventional steels. These results highlight rate-dependent limits of transformation-enabled strengthening and suggest distinct mechanisms under shock- versus inertia-driven deformation, providing key insights for the design of HEAs in extreme environments. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Phase Transformations, |