Correlative chemical and structural investigations of accelerated phase evolution in a nanocrystalline high entropy alloy
Autor: | Alfred Ludwig, Alan Savan, Yujiao Li, Aleksander Kostka |
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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 |
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