High formability of glass plus fcc-Al phases in rapidly solidified Al-based multicomponent alloy
| Autor: | F. F. Han, Akihisa Inoue, E. Shalaan, Shengli Zhu, Y.D. Han, Fahad M. Al-Marzouki, Fanli Kong |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Annealing (metallurgy) Alloy 02 engineering and technology engineering.material Condensed Matter::Disordered Systems and Neural Networks 01 natural sciences law.invention Condensed Matter::Materials Science law 0103 physical sciences Ribbon General Materials Science Crystallization Supercooling 010302 applied physics Mechanical Engineering Metallurgy 021001 nanoscience & nanotechnology Amorphous solid Condensed Matter::Soft Condensed Matter Chemical engineering Mechanics of Materials Vickers hardness test engineering 0210 nano-technology Glass transition |
| Zdroj: | Journal of Materials Science. 52:1246-1254 |
| ISSN: | 1573-4803 0022-2461 |
| DOI: | 10.1007/s10853-016-0394-6 |
| Popis: | A multicomponent Al84Y9Ni4Co1.5Fe0.5Pd1 alloy was found to keep a mixed glassy + Al phases in the relatively large ribbon thickness range up to about 200 μm for the melt-spun ribbon and in the diameter range up to about 1100 μm for the wedge-shaped cone rod prepared by injection copper mold casting. The glassy phase in the Al-based alloy has a unique crystallization process of glass transition, followed by supercooled liquid region, fcc-Al + glass, and then Al + Al3Y + Al9 (Co, Fe)2 + unknown phase. It is also noticed that the primary precipitation phase from supercooled liquid is composed of an Al phase instead of coexistent Al + compound phases, being different from the crystallization mode from supercooled liquid for ordinary Al-based glassy alloys. In addition, it is noticed that the mixed Al and glassy phases are extended in a wide heating temperature range of 588–703 K, which is favorable for the development of high-strength nanostructure Al-based bulk alloys obtained by warm extrusion of mixed Al + amorphous phases. The Vickers hardness is about 415 for the glassy phase and increases significantly to about 580 for the mixed Al and glassy phases. The knowledge of forming Al + glassy phases with high hardness in the wide solidification and annealing conditions through high stability up to complete crystallization for the multicomponent alloy is promising for future development of a high-strength Al-based bulk alloy. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink