Influence of cold work and solutionising temperature on age hardening capability of Al-Mg-Mn alloys with small Cu and Si additions


Zhu, Z. and Starink, M.J. (2005) Influence of cold work and solutionising temperature on age hardening capability of Al-Mg-Mn alloys with small Cu and Si additions. In, Howe, J.M., Laughlin, D.E., Lee, J.K., Srolovitz, D.J. and Dahmen, U. (eds.) Solid-Solid Phase Transformations in Inorganic Materials 2005. Solid-to-Solid Phase Transformation in Inorganic Materials Conference , The Minerals, Metals & Materials Society, 383-390.

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Description/Abstract

The influence of cold rolling and solution treatment on precipitation in Al-(1-3)Mg-0.25Mn-(0 0.4)Cu-0.15Si (wt%) alloys was investigated. After solutionising at 550°C, all alloys showed age hardening, and differential scanning calorimetry (DSC) confirmed the occurrence of precipitation reaction(s) in each alloy. After solutionising at 500°C, all Cu-containing alloys showed precipitation hardening; for Cu-free alloys, only the alloy with 1wt% Mg showed precipitation hardening, and no substantial precipitation hardening was observed for alloys with Mg content 2wt% or higher. This observed suppression of age hardening with increasing Mg content for Cu-free alloys was analysed with reference to the undissolved Mg2Si intermetallics formed during solution treatment. These intermetallics were characterised using FEG-SEM and EDS. For the age hardening alloys solutionised at 500°C, both the time to peak ageing and the amount of precipitation hardening decrease with increasing cold rolling reduction.

Item Type: Book Section
ISBNs: 0873396080 (hardback)
Related URLs:
Keywords: Age hardening capability, precipitation, recovery, Al-Mg-Mn alloys, 5xxx alloys, canstock, S phase, DSC, hardness
Subjects: T Technology > T Technology (General)
T Technology > TJ Mechanical engineering and machinery
T Technology > TN Mining engineering. Metallurgy
Divisions: University Structure - Pre August 2011 > School of Engineering Sciences
ePrint ID: 23914
Date Deposited: 31 Mar 2006
Last Modified: 27 Mar 2014 18:13
Publisher: The Minerals, Metals & Materials Society
URI: http://eprints.soton.ac.uk/id/eprint/23914

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