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Solution strengthening and age hardening capability of Al-Mg-Mn alloys with small additions of Cu

Record type: Article

Nine Al-(1-3)Mg-(0-0.4)Cu-0.15Si-0.25Mn (in wt%) alloys with potential applications in both packaging and automotive industries have been investigated. Tensile testing showed that solution strengthening is in good approximation linearly proportional to the Mg content. Mechanical testing and microstructural examinations of aged samples indicate that Mg2Si phase precipitates contribute to age hardening of Cu-free alloys, whilst both Mg2Si phase and S (Al2CuMg) phases contribute to that of Cu-containing alloys. The age hardening capability is critically influenced by solution treatment temperature: increasing the solution treatment temperature from 500 to 550ºC results in a marked increase in rate of hardening for Cu containing alloys and solution treatment at about 550ºC or higher is needed to allow Mg2Si phase precipitation during ageing in Cu-free alloys with Mg content of about 2% or higher.

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Citation

Zhu, Z. and Starink, M.J. (2008) Solution strengthening and age hardening capability of Al-Mg-Mn alloys with small additions of Cu Materials Science and Engineering: A, 488, pp. 125-133.

More information

Published date: 2008
Keywords: precipitation, solution strengthening, solutionizing, S phase, beta phase, DSC, TEM, SEM, model, yield strength, hardness, cans, automotive
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 49899
URI: http://eprints.soton.ac.uk/id/eprint/49899
ISSN: 0921-5093
PURE UUID: 488a5035-4f90-49dd-98db-7d50757a8884

Catalogue record

Date deposited: 13 Dec 2007
Last modified: 17 Jul 2017 14:54

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Contributors

Author: Z. Zhu
Author: M.J. Starink

University divisions


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