| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys II
|
| Presentation Title |
J-71: Relaxation and Diffusion Processes at High Temperature in Fe-Mn-Cr-Ni-Co High Entropy Alloy Studied by Mechanical Spectroscopy |
| Author(s) |
Jose M. San Juan, Lucía Del-Río, Guillaume Laplanche, María L. Nó |
| On-Site Speaker (Planned) |
Jose M. San Juan |
| Abstract Scope |
High entropy alloys (HEA) exhibit in general a sluggish diffusion making them more stable at high temperature being this aspect relevant for its creep behavior. However, the compositional complexity of the HEA makes the study of the atomic diffusion processes more difficult than in conventional alloys.
In the present work the study of the relaxation processes associated with the atomic diffusion mechanisms in a Fe-Mn-Cr-Ni-Co HEA. This is approached through mechanical spectroscopy and measuring the internal friction spectra and dynamic modulus variation in the temperature range between 300ºC and 1000ºC. Two relaxation processes have been identified in the internal friction spectra, as well as the diffusional mechanism associated with the precipitation of some stable phases. The analysis of the internal friction spectra allows obtaining the activation energy of the active relaxation processes, establishing a relationship with the diffusive atomic species. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Characterization, Mechanical Properties |