Abstract
Phase decomposition in hot band of a continuous cast AA 2037 Al alloy was investigated by coincidence Doppler broadening (CDB) of positron annihilation radiation and positron annihilation lifetime spectroscopy (PALS). It was found that there existed V-Cu and V-Cu-Mg complexes in the as-received hot band at room temperature. At 200°C, positron average lifetime appeared to be a maximum value because of the formation of semi-coherent precipitates. The shape of the CDB ratio curve was found to be characteristic of Mn, which indicated the formation of V-Mn complexes or the existence of Mn clusters in the semicoherent precipitates. Above 250°C, coarsening and dissolution of semi-coherent precipitates resulted in a decrease in lifetime and disappearance of the Mn signal, but the Cu signal increased clearly with increase in annealing temperature.
| Original language | English |
|---|---|
| Pages (from-to) | 3497-3501 |
| Number of pages | 5 |
| Journal | Physica Status Solidi (C) Current Topics in Solid State Physics |
| Volume | 4 |
| Issue number | 10 |
| DOIs | |
| State | Published - 2007 |
| Event | 14th International Conference on Positron Annihilation, ICPA 14 - Hamilton, ON, Canada Duration: Jul 23 2006 → Jul 28 2006 |
ASJC Scopus subject areas
- Condensed Matter Physics