Abstract
The nucleation of intermediate phases in aluminium alloys containing silver and copper has been examined. When aged isothermally these alloying elements precipitate as the metastable phases θ′(Al2Cu) and γ(Ag2Al), forming on {100} and {111} habit planes respectively. This study focuses on determining the influence of the θ′ precipitate phase upon the nucleation of the γ phase. Alloys with equimolar amounts of copper and silver show a considerably more refined distribution of the γ phase than equivalent binary aluminium-silver alloys. In addition, the θ′ precipitate is seen in close association with one or more γ particles, with the silver-rich precipitate adjoining a growth ledge of the θ′ phase. This suggests that θ′, and in particular the growth ledges, play a role in the nucleation of γ.
Original language | English |
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Pages | 41-46 |
Number of pages | 6 |
Publication status | Published - 1 Dec 2005 |
Event | International Conference on Solid-Solid Phase Transformations in Inorganic Materials (PTM) 2005 - Phoenix Arizona USA, Phoenix, United States of America Duration: 29 May 2005 → 3 Jun 2005 |
Conference
Conference | International Conference on Solid-Solid Phase Transformations in Inorganic Materials (PTM) 2005 |
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Abbreviated title | PTM 2005 |
Country | United States of America |
City | Phoenix |
Period | 29/05/05 → 3/06/05 |
Keywords
- Aluminium alloys
- Copper
- Nucleation
- Silver