Solution strengthening and age hardening capability of Al-Mg-Mn alloys with small additions of Cu
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, 125-133.
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.
|Keywords:||precipitation, solution strengthening, solutionizing, S phase, beta phase, DSC, TEM, SEM, model, yield strength, hardness, cans, automotive|
|Subjects:||T Technology > TJ Mechanical engineering and machinery
T Technology > TN Mining engineering. Metallurgy
|Divisions:||University Structure - Pre August 2011 > School of Engineering Sciences > Engineering Materials & Surface Engineering
|Date Deposited:||13 Dec 2007|
|Last Modified:||08 Jun 2012 12:20|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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