Abstract
We have performed a systematic transmission electron microscopy study of precipitated particles in Mg-Zn-Gd-based alloys after annealing. We find that the Mg-Zn phases and ellipsoidal-shaped icosahedral quasicrystal phases (I-phase) are precipitated and distributed by partition in the grains, which can be attributed to the composition segregation of the alloying elements in the as-cast alloys. The content of alloying element is found to be crucial to the precipitation of nanoscale I-phase. The nanoscale I-phase ranges in size from a few to dozens of nanometers, revealing that the precipitation process satisfies the classical nucleation and growth theory.
Original language | English |
---|---|
Pages (from-to) | 236-239 |
Number of pages | 4 |
Journal | Materials Letters |
Volume | 130 |
DOIs | |
Publication status | Published - 2014 Sep 1 |
Keywords
- Magnesium
- Metals and alloys
- Microstructure
- Quasicrystalline
- Segregation
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering