Precipitation of the θ'(Al2Cu) phase in Al-Cu-Ag alloys  

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Abstract

Precipitation of the ? (Al 2Cu) phase was examined in Al-(1.75-x) at. Cu-x at. Ag alloys. In alloys containing trace Ag the ? precipitates formed T- or cross-shaped arrays of sympathetically-nucleated arrays similar to those reported in binary Al-Cu alloys. However, in alloys with equal atomic levels of copper and silver the ? plates formed at specific sites on dislocation loops alongside pre-existing ? (AlAg 2) precipitates. The dislocation loops appeared to dissociate at these sites in a manner which would provide a stacking fault that was isostructural with the ? precipitate. Energy dispersive X-ray (EDX) mapping showed that the dislocation loops were silver-enriched at the sites where the ? phase eventually precipitated and that a silver atmosphere remained after precipitation of the ? plates.
Original languageEnglish
Title of host publicationLight Metals 2012
EditorsCarlos E Suarez
Place of PublicationHoboken NJ USA
PublisherJohn Wiley & Sons
Pages307-312
Number of pages6
ISBN (Print)9781118291399
DOIs
Publication statusPublished - 2012
EventTechnical Session on Light Metals held at the TMS Annual Meeting 2012 - Orlando, United States of America
Duration: 11 Mar 201215 Mar 2012
https://link.springer.com/book/10.1007/978-3-319-48179-1 (Proceedings)

Conference

ConferenceTechnical Session on Light Metals held at the TMS Annual Meeting 2012
Abbreviated titleLight Metals 2012
CountryUnited States of America
CityOrlando
Period11/03/1215/03/12
Other Proceedings of the technical sessions presented by the TMS Aluminum Committee at the TMS 2012 Annual Meeting & Exhibition, Orlando, Florida, USA March 11-15,2012
Internet address

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