| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys II
|
| Presentation Title |
Investigation on Formation of Duplex Microstructure and Mechanical Properties in CrMnFeCoNiAlxTiy High-entropy Alloy |
| Author(s) |
Jongtae Kim, Juree Jung, Jinwoo Seok, Junwoo Song, Jeongeun Kim, Gian Song, Junhee Han |
| On-Site Speaker (Planned) |
Jongtae Kim |
| Abstract Scope |
CrMnFeCoNi High-entropy-alloys (HEAs) has a single phase of Face-Centered-Cubic (FCC) structure, which shows high ductility, but low strength. Recently, several studies have reported that the Al addition to CrMnFeCoNi HEA induces a phase transition from FCC to Body-Centered-Cubic (BCC) structure due to their large atomic radius difference. The formation or increase of the BCC phase increases strength, but significant reduction in ductility follows. In this study, we developed a duplex-structured HEA by adding alloying elements and heat treatment with an objective to improve the strength and plasticity simultaneously. For the formation of duplex-structured alloy, proper amount of Al and Ti elements were added to CrMnFeCoNi HEA and then thermo-mechanical process was performed based on thermodynamic calculation and differential scanning calorimetry (DSC) results. Microstructure and mechanical properties were investigated by X-ray diffraction, scanning electron microscopy, electron backscatter diffraction, transmission electron microscopy, and universal testing machine. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Mechanical Properties, Characterization |