Grain refinement of Mg-Al alloys by carbon inoculation
Publikation: Beiträge in Sammelwerken › Aufsätze in Konferenzbänden › Forschung › begutachtet
Authors
Grain refinement of magnesium alloys not only reduces the hot tearing and improves their mechanical properties, but also weakens the lexture and improves their isotropic properties. In aluminium-free magnesium alloys, the element Zr is an effective nucleants to refine the microstructure and its mechanism of grain refinement is clear. In Al-containing magnesium alloys, the grain refinement by carbon inoculation was considered to be the best approach until now. However, the mechanism of grain refinement is still unclear. After inoculated by carbon or SiC particles, the grain size of as-cast Mg-Al alloys reduces largely. Different from the previous results, a ternary carbide Al 2MgC2, which has a closer crystal structure to magnesium than A14C3, was observed in Mg-Al alloys after inoculated by carbon or SiC particles. The mechanism of grain refinement by SiC inoculations is the same as that by carbon inoculation. The grain refinement is mainly attributed to the enhanced nucleation of alpha-Mg on the surface of the ternary compound Al2MgC2.
| Originalsprache | Englisch |
|---|---|
| Titel | Magnesium Technology 2010 - Held During TMS 2010 Annual Meeting and Exhibition |
| Herausgeber | Sean R. Agnew, Neale R. Neelameggham, Eric A. Nyberg, Wim H. Sillekens |
| Anzahl der Seiten | 6 |
| Verlag | John Wiley & Sons Inc. |
| Erscheinungsdatum | 2010 |
| Seiten | 419-424 |
| ISBN (Print) | 9780873397469, 0873397460 |
| Publikationsstatus | Erschienen - 2010 |
| Extern publiziert | Ja |
| Veranstaltung | Magnesium Technology 2010 - TMS 2010 Annual Meeting and Exhibition - Seattle, WA, USA / Vereinigte Staaten Dauer: 14.02.2010 → 18.02.2010 |
- Ingenieurwissenschaften