About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
High Entropy Alloys VIII
|
Presentation Title |
J-41: Evolution of Texture during Thermo-mechanical Processing of High Entropy Alloy (HEA) |
Author(s) |
Shi Hoon Choi, Min-seong Kim, Lalit Kaushik , Jaiveer Singh |
On-Site Speaker (Planned) |
Shi Hoon Choi |
Abstract Scope |
In the present study, a high entropy alloy (HEA) of equiatomic CrMnFeCoNi was processed by vacuum induction melting followed by cold rolling. In order to break down the coarse cast structure, the homogenized specimens at 1,200° for 48 hrs were subsequently cold-rolled to ~80% reduction in thickness to a thickness of ~5 mm. These fully annealed specimens with thickness ~5 mm were used as the starting materials for subsequent ESAR (equal speed asymmetric rolling) processing up to 80% reduction in thickness to a final thickness of ~1mm and isochronally annealed for 1 hr at temperatures ranging from 800°C to 1,100°C. This was done to investigate the evolution of microstructure and partial recrystallization kinetics during thermo-mechanical processing of HEA. The annealing twin boundary fraction increased with increasing annealed grain size. The electron channeling contrast imaging (ECCI) was used for direct observation of stacking faults and dislocations at different strain levels. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume |