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Overview of recent work on precipitation in Al-Cu-Mg alloys

Wang, S.C., Starink, M.J. and Gao, N. (2007) Overview of recent work on precipitation in Al-Cu-Mg alloys Materials Science Forum, 546-549, pp. 775-782.

Record type: Article

Abstract

Recent work on Al-Cu-Mg based alloys with Cu:Mg atomic ratio close to unity is reviewed to clarify the mechanisms for age hardening. During the first stage of hardening a substantial exothermic heat evolution occurs whilst the microstructural change involves the formation of initially Cu-rich / Mg-rich clusters and later Cu-Mg co-clusters. The data show that the first stage of the age hardening is due to the formation of Cu-Mg co-clusters. The combined experimental methods show the second stage hardening is dominated by formation of S phase, which forms a dense precipitation at the peak hardness stage, whilst no significant amounts of other phases or zones are detected. S phase strengthens the alloy predominantly through the Orowan looping mechanism. These findings are incorporated into a multi-phase, multi-mechanism model for yield strength of Al-Cu-Mg based alloys.

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More information

Published date: 2007
Additional Information: Series ISSN 0255-5476
Keywords: al-cu-mg alloys, clusters, precipitates, hardening
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 40868
URI: http://eprints.soton.ac.uk/id/eprint/40868
ISBN: 0878494324
ISSN: 1662-9752
PURE UUID: a0e90e20-1187-4360-ac2e-2154905d1ca7

Catalogue record

Date deposited: 12 Jul 2006
Last modified: 17 Jul 2017 15:33

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Contributors

Author: S.C. Wang
Author: M.J. Starink
Author: N. Gao

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