Correlative chemical and structural investigations of accelerated phase evolution in a nanocrystalline high entropy alloy
| Autor: | Alfred Ludwig, Alan Savan, Yujiao Li, Aleksander Kostka |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Annealing (metallurgy) Mechanical Engineering Alloy Kinetics Metals and Alloys 02 engineering and technology Activation energy Atom probe engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Decomposition Nanocrystalline material law.invention Mechanics of Materials Transmission electron microscopy Chemical physics law 0103 physical sciences engineering General Materials Science 0210 nano-technology |
| Zdroj: | Scripta Materialia. 183:122-126 |
| ISSN: | 1359-6462 |
| Popis: | Based on our recently-developed combinatorial processing platforms for accelerated investigations of phase evolution in multinary alloys, a novel correlative atom probe tomography and transmission electron microscopy approach is proposed to study phase stability in a nanocrystalline CrMnFeCoNi alloy. We observed that the material can decompose at 250 °C for 5 h or 300 °C for 1 h, having the same decomposed products as in its coarse-grained counterpart after annealing at 500 °C for 500 days. A low apparent activation energy for the diffusion of Ni in the nanocrystalline alloy is derived and explains the fast kinetics of phase decomposition in nanocrystalline alloys. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect