Abstract
In order to clarify the formation process of 6H-phase in RS P/M Mg97Zn1Y2 alloy, transmission electron microscopy (TEM) observations have been carried out. The initial microstructure of RS powder consists of cellular structure. The equiaxed grains about 1 μm in average diameter are surrounded by rather wide Y and Zn rich amorphous grain boundaries. 6H-phase was observed at grain boundaries in the RS ribbon prepared at circumferential speed of 42 m/s. By lowering the circumferential speed, the 6H-phase at grain boundary in the RS ribbon changes to amorphous phase. The growth of 6H-phase starts from grain boundary in the RS ribbon annealed at 573 K for 1.2 ks. It can be concluded that the 6H-phase in RS P/M Mg97Zn1Y2 alloy crystallizes in the Y and Zn rich amorphous phase at grain boundary and then grows into grain interior during extrusion.
| Original language | English |
|---|---|
| Pages (from-to) | 715-720 |
| Number of pages | 6 |
| Journal | Materials Science Forum |
| Volume | 419-422 |
| Issue number | II |
| Publication status | Published - 2003 |
| Externally published | Yes |
| Event | Proceedings of the Second Osaka International Conference on Platform Science and Technology for Advanced Magnesium Alloys 2003 - Osaka, Japan Duration: Jan 26 2003 → Jan 30 2003 |
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering