| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Late News Poster Session
|
| Presentation Title |
Quasi-hydrostatic Quasi-constrained Severe Plastic Deformation of Ternary Medium Entropy Alloy |
| Author(s) |
Saumya Ranjan Jha, Krishanu Biswas, N P Gurao |
| On-Site Speaker (Planned) |
Saumya Ranjan Jha |
| Abstract Scope |
Many recent investigations have shown medium-entropy-alloys exhibiting better mechanical properties than their high-entropy counterparts. Besides a high contribution from friction-stresses and solid-solution-strengthening, strain-hardening is an important contributor to the strength observed in these systems. Severe-plastic-deformation(SPD) techniques like High-Pressure-Torsion(HPT) incorporate very high shear-strain in the material, leading to ultrafine-grained(UFG) microstructures, which cause manifold increase in strength. This work shows the variation in mechanical properties at different radial displacements from the center of HPT tested FeMnNi(low-SFE FCC-alloy) synthesized by casting-route, which shows significantly higher toughness than its high-entropy counterparts like Cantor-alloy. The gradient in grain-sizes along the radial-direction of these specimens has been modeled using microstructure-entropy for predicting the mechanical properties, which has also been validated by indentation-tests. The dislocation-density is computed by FEM-simulations for varying strains and validated by analyzing synchrotron-diffraction data. Thus, the model can be utilized to predict the strengthening behavior of similar systems subjected to quasi-hydrostatic loading conditions. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
High-Entropy Alloys, Mechanical Properties, Modeling and Simulation |