| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys II
|
| Presentation Title |
Deformation Behavior of CoCrFeMnNi High Entropy Alloy Highly Strained by Torsion at Elevated Temperatures |
| Author(s) |
Nobuhiro Tsuji, Reza Gholizadeh, Shuhei Yoshida, Yu Bai, Shu Kurokawa, Akinobu Shibata |
| On-Site Speaker (Planned) |
Nobuhiro Tsuji |
| Abstract Scope |
Equi-atomic CoCrFeMnNi alloy was deformed over a wide range of strains up to equivalent strains of 5.5 by torsion at various temperatures ranging from 25 °C to 1100 °C. It was found that deformation twining, which is normally absent in this alloy except for cryo-temperature deformation, was activated at moderate to high strains and even found in the deformation at temperatures as high as 600 °C. The HEA showed outstanding deformability, which was attributed to the extensive twin activities including the formation of twin bundles and thin nanotwins as well as microbands formation. A sudden shortage of ductility occurred at intermediate temperatures at 600 °C~700 °C, which was caused by the precipitation of Cr-rich σ-phases at grain boundaries. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Mechanical Properties, |