Hot workability characteristics of cast and homogenized Mg-3Sn-1Ca alloy
Publikation: Beiträge in Zeitschriften › Zeitschriftenaufsätze › Forschung › begutachtet
Authors
Hot working behavior of Mg-3Sn-1Ca alloy has been evaluated with a view to explore its potential as a wrought alloy. The temperature and strain rate dependence of steady state flow stress has been analyzed. The processing maps exhibited two domains both in the temperature range 350-550 °C with one in the lower strain rate range (0.0003-0.01 s-1) and the other at higher strain rates (1-10 s-1). The apparent activation energies estimated in these two domains respectively are 217 kJ/mole and 154 kJ/mole. The activation area values obtained, after making a correction for the back-stress generated by the hard intermetallic CaMgSn particles, are in the range 13-100 b2 and decreased with increasing effective stress. The corrected results suggest that the lower strain rate domain is controlled by lattice self-diffusion and grain boundary diffusion occurs at higher strain rates. Extrusion at 500 °C and at a speed that corresponds to an average strain rate of 3 s-1 yielded a sound product with a dynamically recrystallized microstructure.
| Originalsprache | Englisch |
|---|---|
| Zeitschrift | Journal of Materials Processing Technology |
| Jahrgang | 201 |
| Ausgabenummer | 1-3 |
| Seiten (von - bis) | 359-363 |
| Anzahl der Seiten | 5 |
| ISSN | 0924-0136 |
| DOIs | |
| Publikationsstatus | Erschienen - 26.05.2008 |
| Extern publiziert | Ja |
- Ingenieurwissenschaften