| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Alloying Effects and Mechanical Behavior of FCC Multi-Principal Element Alloys Containing Sigma Precipitates |
| Author(s) |
Bibhu Prasad Sahu, Wenle Xu, Daniel Salas, Mrinalini Mulukutla, Trevor Hastings, Raymundo Arróyave, Ibrahim Karaman |
| On-Site Speaker (Planned) |
Bibhu Prasad Sahu |
| Abstract Scope |
We have investigated the effect of alloying elements on the microstructure and room temperature deformation mechanisms of Multi-Principal Element Alloys (MPEA) containing sigma precipitates embedded in an FCC matrix. The vacuum arc-melted Ni-Fe-Co-Cr-V-Mn-Al HEAs were solution heat treated at 1100°C for 24 hours, followed by cold rolling with a 65% reduction in thickness and a recrystallization heat treatment at 950°C for 30 minutes. In these FCC alloys, increasing the V and Cr content leads to the formation of a brittle sigma phase, significantly enhancing yield strength and plastic strain hardening rate at the cost of ductility. The microstructure of these alloys has been investigated in detail using X-ray diffraction, scanning electron microscopy, and transmission electron microscopy, at different applied strain levels under tension. In this presentation, the deformation mechanisms and the role of such brittle sigma phase on the mechanical behavior of the FCC MPEAs will be discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Characterization, Mechanical Properties |