| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Modeling the Effects of Initial Grain Size, Martensitic Transformation Induced Dynamic Grain Refinement, Phases, and Texture on Strength of a High Entropy Alloy Using Crystal Plasticity |
| Author(s) |
Marko Knezevic |
| On-Site Speaker (Planned) |
Marko Knezevic |
| Abstract Scope |
Microstructurally flexible high entropy alloys (HEAs) can be tailored for strength via dual-phase strengthening mechanisms, which originate from the strain-induced phase transformation microstructural phenomena. One such alloy is a recently synthesized Fe42Mn28Co10Cr15Si5 (at%) HEA consisting of metastable austenite (γ), stable epsilon martensite (ε), and stable sigma (σ) phases. A crystal plasticity model incorporating a physically based phase transformation and hardening models is used to interpret the effects of strain induced phase transformation phenomena on the overall hardening response of the alloy. The deformation of constituent grains per phase in the alloy is modeled as a combination of anisotropic elasticity, crystallographic glide, and γ→ε phase transformation. Good predictions of the model elucidate that the transformation induced dynamic Hall-Petch-type barrier effect is the primary origin of strain hardening along with the increase in the ε-phase fraction and dislocation density, while the individual strength of the phases gives rise to the overall strength. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, |