| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
High Entropy Alloys IX: Alloy Development and Properties
|
| Presentation Title |
Tracer Diffusion in Single Crystalline CoCrFeNi and CoCrFeMnNiHigh-entropy Alloys: Kinetic Hints towards a Low-temperature PhaseInstability of the Solid-solution? |
| Author(s) |
Daniel Gaertner, Josua Kottke, Yury Chumlyakov, Fabian Hergemöller, Gerhard Wilde, Sergiy V. Divinski |
| On-Site Speaker (Planned) |
Daniel Gaertner |
| Abstract Scope |
Tracer-diffusion of constituting elements in single-crystalline CoCrFeNi and CoCrFeMnNi is measured from 923 K to 1373 K. In CoCrFeMnNi, low-temperature deviations from otherwise linear Arrhenius-type dependencies are seen for all elements excluding Mn. The kinks are prominent at about 1100 K for Co and Ni and at 900 K for Cr and Fe indicating the existence of a low-temperature modification of the equiatomic solid-solution phase in CoCrFeMnNi. The temperature-dependent correlation factors of all elements are determined within the framework of the random alloy model providing insights into potential
mechanisms of the kinetic anomaly. |
| Proceedings Inclusion? |
Planned: |