Cluster hardening in an aged Al-Cu-Mg alloy

A new interpretation of the origin of hardening in aged Al-Cu-Mg alloys is presented. In particular, it is suggested that the rapid hardening reaction in Al-1.1Cu-1.7Mg (at. pct) alloys aged at 150 C is due to the formation of pre-precipitate atomic co-clusters of Cu and Mg. Cluster hardening, which...

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Bibliographic Details
Published in:Scripta materialia 1997-03, Vol.36 (5), p.517-521
Main Authors: Ringer, Simon P., Hono, Kazuhiro, Sakurai, Toshio, Polmear, Ian J.
Format: Article
Language:English
Subjects:
Applied sciences
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Metals. Metallurgy
Physics
Solid solution hardening, precipitation hardening, and dispersion hardening
aging
Solid solution, precipitation, and dispersion hardening
aging
Treatment of materials and its effects on microstructure and properties
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Summary:A new interpretation of the origin of hardening in aged Al-Cu-Mg alloys is presented. In particular, it is suggested that the rapid hardening reaction in Al-1.1Cu-1.7Mg (at. pct) alloys aged at 150 C is due to the formation of pre-precipitate atomic co-clusters of Cu and Mg. Cluster hardening, which is due to the formation of subnanometer atomic clusters, may represent a new hardening mechanism applicable to a range of Al-Cu-Mg alloys. (AIAA)
ISSN:1359-6462
1872-8456
DOI:10.1016/S1359-6462(96)00415-0