| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Microstructure and texture of heavily cold-rolled and annealed Al-modified extremely low stacking fault energy Cr1.3Co1Fe1Mn1Ni0.7 high entropy alloy |
| Author(s) |
Krishna Chaitanya Nuli, Suvra Paul, Pankaj Ojha, Saha Rajib, Mayur Vaidya, Pinaki Prasad Bhattacharjee |
| On-Site Speaker (Planned) |
Krishna Chaitanya Nuli |
| Abstract Scope |
The effect of heavy cold-rolling and annealing on the microstructure, texture evolution, and tensile properties of an Al0.3Cr1.3Co1Fe1Mn1Ni0.7 high entropy alloy (HEA) was investigated. Adding Al to the extremely low-stacking fault energy (SFE) base HEA Cr1.3Co1Fe1Mn1Ni0.7 (SFE ~3.5 mJ/m2) resulted in a dual-phase (FCC+BCC/B2) microstructure. Deformation-induced ultrafine/nanostructure, intense shear band formation, and pure brass-type ({110}<112>) texture formation in the FCC phase were observed after heavy cold-rolling. Annealing at 850°C resulted in the formation of ultrafine-grained (UFG) recrystallized microstructure (d ̅< 1µm) with profuse Cr-rich σ precipitates at the grain boundaries. The sluggish grain growth of the HEA was due to the pinning of the secondary phases, which restricted the grain size to ~ 20 µm at 1200°C. The intensity of α-fiber (ND//<110>) in the recrystallization texture increased with increasing annealing temperature. The annealed UFG structure demonstrated an appreciable yield strength combined with appreciable ductility. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Characterization, Other |