| Autor: |
Martin Balog, Miroslav Cavojsky, Frantisek Simancik, Jiri Dvorak, Peter Švec, Peter Krizik, Dušan Janičkovič, Emília Illeková |
| Rok vydání: |
2012 |
| Předmět: |
|
| Zdroj: |
Materials Science and Engineering: A. 549:233-241 |
| ISSN: |
0921-5093 |
| DOI: |
10.1016/j.msea.2012.04.051 |
| Popis: |
The rapidly solidified AlCr4.7Fe1.1Si0.3 (at.%) alloy produced at large scale by direct extrusion of gas atomised powders was investigated. Hot-extrusion yielded sound compacts and did not create any major structural changes compared to the as-atomised state. Microstructural characterisation of the as-extruded material revealed submicron scale α-Al grains with an embedded Al7Cr crystalline phase and traces of a nano-scale quasicrystalline Al84.6Cr15.4 phase. The long-term thermal stability up to 300 °C of compacts was proven. The thermal stability of compacts was accompanied by high mechanical properties, especially high strength and Young's modulus, and creep performance up to 300 °C. The same material was prepared by laboratory scale extrusion of cryo-chopped melt-spun ribbons as a reference material. No major differences in the structure or properties of the industrially prepared material were observed compared to the reference material. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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