| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys II
|
| Presentation Title |
Phase Stability in the Ternary CoCrNi Alloy |
| Author(s) |
Sakshi Bajpai, Calvin H. Belcher, Benjamin E. MacDonald, Julia Ivanisenko, Horst Hahn, Diran Apelian, Enrique J. Lavernia |
| On-Site Speaker (Planned) |
Sakshi Bajpai |
| Abstract Scope |
The ternary CoCrNi alloy is well known for its exceptional mechanical behavior, particularly at cryogenic temperature. This behavior has been attributed to complex deformation modes including activation of nano-twinning in this system. Recently, chemical short-range order (CSRO) has also been confirmed in the ternary alloy through simulations and experiments. Although CoCrNi is generally considered a single-phase FCC system, thermodynamic phase diagram calculations predict the stability of a secondary phase at intermediate temperatures, yet to be confirmed experimentally. In this work, the phase stability of the ternary CoCrNi at intermediate temperatures is investigated in various grain size regimes which were achieved through varied deformation processing. Heat treatment experiments guided by CALPHAD were performed to study the phase decomposition in the ternary system using X-Ray diffraction and electron microscopy techniques. The effect of thermo-mechanical treatment on the mechanical properties of the CoCrNi alloy was also evaluated using tensile and hardness testing. |
| Proceedings Inclusion? |
Planned: |