| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys IV: Mechanical Behavior
|
| Presentation Title |
Deciphering the Operative Micromechanisms Affecting the Strain Rate Sensitivity in (FeCrNi)99Si1 Medium Entropy Alloy |
| Author(s) |
Swati Mahato, Krishanu Biswas, Nilesh P Gurao |
| On-Site Speaker (Planned) |
Swati Mahato |
| Abstract Scope |
The present investigation aims to decipher the operative micromechanisms influencing the strain rate sensitivity(SRS) and activation volume(AV) in low SFE (FeCrNi)99Si1 medium entropy alloy. Nanoindentation techniques using different loading rates were employed to estimate the SRS and AV of the alloy subjected to high-pressure torsion samples at 300K to study the effect of strain. Unlike the general trend followed by FCC metals and alloys,(FeCrNi)99Si1 exhibits decreased SRS with decreasing grain size. Furthermore, the alloy exhibits remarkably low AV in the microcrystalline grain size regime which decreases marginally with grain size reduction to the nanocrystalline regime. The present study explores the deviation from the reported trend by examining the evolution of dislocation structure as well as the synergetic operation of additional mechanisms like twinning, phase transformation, cluster strengthening, and short-range ordering due to the aperiodic energy landscape of the MEA. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Mechanical Properties, Other |